451
|
Marincean S, Jackson JE. Quest for IR-Pumped Reactions in Dihydrogen-Bonded Complexes. J Phys Chem A 2004. [DOI: 10.1021/jp048626p] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Simona Marincean
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
| | - James E. Jackson
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
| |
Collapse
|
452
|
Barrio P, Esteruelas MA, Lledós A, Oñate E, Tomàs J. Influence of the Cis Ligand on the H−H Separation and the Rotation Barrier of the Dihydrogen in Osmium-Elongated Dihydrogen Complexes Containing an Ortho-Metalated Ketone. Organometallics 2004. [DOI: 10.1021/om0342513] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pilar Barrio
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Unitat de Química Física, Departament de Química, Universitat Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Unitat de Química Física, Departament de Química, Universitat Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Agustí Lledós
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Unitat de Química Física, Departament de Química, Universitat Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Unitat de Química Física, Departament de Química, Universitat Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Jaume Tomàs
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain, and Unitat de Química Física, Departament de Química, Universitat Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| |
Collapse
|
453
|
Solimannejad M, Boutalib A. A computational study of the weakly bound dimers XBeH⋯HArF (X=H, F, Cl and Br). Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.03.127] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
454
|
Mo Y, Song L, Wu W, Zhang Q. Charge Transfer in the Electron Donor−Acceptor Complex BH3NH3. J Am Chem Soc 2004; 126:3974-82. [PMID: 15038752 DOI: 10.1021/ja039778l] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
As a simple yet strongly binding electron donor-acceptor (EDA) complex, BH(3)NH(3) serves as a good example to study the electron pair donor-acceptor complexes. We employed both the ab initio valence bond (VB) and block-localized wave function (BLW) methods to explore the electron transfer from NH(3) to BH(3). Conventionally, EDA complexes have been described by two diabatic states: one neutral state and one ionic charge-transferred state. Ab initio VB self-consistent field (VBSCF) computations generate the energy profiles of the two diabatic states together with the adiabatic (ground) state. Our calculations evidently demonstrated that the electron transfer between NH(3) and BH(3) falls in the abnormal regime where the reorganization energy is less than the exoergicity of the reaction. The nature of the NH(3)-BH(3) interaction is probed by an energy decomposition scheme based on the BLW method. We found that the variation of the charge-transfer energy with the donor-acceptor distance is insensitive to the computation levels and basis sets, but the estimation of the amount of electron transferred heavily depends on the population analysis procedures. The recent resurgence of interest in the nature of the rotation barrier in ethane prompted us to analyze the conformational change of BH(3)NH(3), which is an isoelectronic system with ethane. We found that the preference of the staggered structure over the eclipsed structure of BH(3)NH(3) is dominated by the Pauli exchange repulsion.
Collapse
Affiliation(s)
- Yirong Mo
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, USA.
| | | | | | | |
Collapse
|
455
|
Hugas D, Simon S, Duran M. Counterpoise-corrected potential energy surfaces for dihydrogen bonded systems. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.01.083] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
456
|
Grochala W, Edwards PP. Thermal Decomposition of the Non-Interstitial Hydrides for the Storage and Production of Hydrogen. Chem Rev 2004; 104:1283-316. [PMID: 15008624 DOI: 10.1021/cr030691s] [Citation(s) in RCA: 570] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wojciech Grochala
- The School of Chemistry, The University of Birmingham, Edgbaston, Birmingham, B15 2TT UK.
| | | |
Collapse
|
457
|
Wu D, Li ZR, Hao XY, Jalbout AF, Adamowicz L, Li RJ, Sun CC. An ab initio theoretical prediction: An antiaromatic ring π-dihydrogen bond accompanied by two secondary interactions in a “wheel with a pair of pedals” shaped complex FH⋯C4H4⋯HF. J Chem Phys 2004; 120:1330-5. [PMID: 15268258 DOI: 10.1063/1.1623744] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
By the counterpoise-correlated potential energy surface method (interaction energy optimization), the structure of the pi H-bond complex FH cdots, three dots, centered FH . . . C4H4 . . . HF has been obtained at the second-order Møller-Plesset perturbation theory (MP2/aug-cc-pVDZ) level. Intermolecular interaction energy of the complex is calculated to be -7.8 kcal/mol at the coupled-cluster theory with single, double substitutions and perturbatively linked triple excitations CCSD (T)/aug-cc-pVDZ level. The optimized structure is a "wheel with a pair of pedals" shaped (1mid R:1) structure in which both HF molecules almost lie on either vertical line passing through the middle-point of the C[Double Bond]C bond on either side of the horizontal plane of the C4 ring for cyclobutadiene. In the structure, an antiaromatic ring pi-dihydrogen bond is found, in which the proton acceptor is antiaromatic 4 electron and 4 center pi bond and the donors are both acidic H atoms of HF molecules. In accompanying with the pi-dihydrogen bond, two secondary interactions are exposed. The first is a repulsive interaction between an H atom of HF and a near pair of H atoms of C4H4 ring. The second is the double pi-type H bond between two lone pairs on a F atom and a far pair of H atoms.
Collapse
Affiliation(s)
- Di Wu
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China
| | | | | | | | | | | | | |
Collapse
|
458
|
Grabowski SJ, Pfitzner A, Zabel M, Dubis AT, Palusiak M. Intramolecular H···H Interactions for the Crystal Structures of [4-((E)-But-1-enyl)-2,6-dimethoxyphenyl]pyridine-3-carboxylate and [4-((E)-Pent-1-enyl)-2,6-dimethoxyphenyl]pyridine-3-carboxylate; DFT Calculations on Modeled Styrene Derivatives. J Phys Chem B 2004. [DOI: 10.1021/jp0351829] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sławomir J. Grabowski
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Arno Pfitzner
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Manfred Zabel
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Alina T. Dubis
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Marcin Palusiak
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| |
Collapse
|
459
|
Tunik SP, Pilyugina TS, Koshevoy IO, Selivanov SI, Haukka M, Pakkanen TA. Reaction of (S)-BINAP with H4Ru4(CO)12. The First Example of Face-Bridging BINAP Coordination and 100% Stereoselectivity in Formation of a Chiral Tetranuclear Cluster Framework. Organometallics 2004. [DOI: 10.1021/om034288n] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sergey P. Tunik
- Department of Chemistry, St. Petersburg University, Universitetskii pr., 26, St. Petersburg 198504, Russian Federation, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland
| | - Tatiana S. Pilyugina
- Department of Chemistry, St. Petersburg University, Universitetskii pr., 26, St. Petersburg 198504, Russian Federation, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland
| | - Igor O. Koshevoy
- Department of Chemistry, St. Petersburg University, Universitetskii pr., 26, St. Petersburg 198504, Russian Federation, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland
| | - Stanislav I. Selivanov
- Department of Chemistry, St. Petersburg University, Universitetskii pr., 26, St. Petersburg 198504, Russian Federation, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland
| | - Matti Haukka
- Department of Chemistry, St. Petersburg University, Universitetskii pr., 26, St. Petersburg 198504, Russian Federation, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland
| | - Tapani A. Pakkanen
- Department of Chemistry, St. Petersburg University, Universitetskii pr., 26, St. Petersburg 198504, Russian Federation, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland
| |
Collapse
|
460
|
Zierkiewicz W, Hobza P. The dihydrogen bond in X3C–H⋯H–M complexes (X = F, Cl, Br; M = Li, Na, K). A correlated quantum chemical ab initio and density functional theory study. Phys Chem Chem Phys 2004. [DOI: 10.1039/b410112j] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
461
|
KUBAS GREGORYJ. HETEROLYTIC SPLITTING OF HH, SiH, AND OTHER σ BONDS ON ELECTROPHILIC METAL CENTERS. ADVANCES IN INORGANIC CHEMISTRY 2004. [DOI: 10.1016/s0898-8838(04)56005-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
462
|
Aydeniz Y, Oguz F, Yaman A, Konuklar AS, Dogan I, Aviyente V, Klein RA. Barriers to internal rotation around the C–N bond in 3-(o-aryl)-5-methyl-rhodanines using NMR spectroscopy and computational studies. Electron density topological analysis of the transition states. Org Biomol Chem 2004; 2:2426-36. [PMID: 15326522 DOI: 10.1039/b406556e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have investigated the pairs of rotational isomers for six 3-(o-aryl)-5-methyl-rhodanines (Z = H, F, Cl, Br, OH, and CH3) using NMR spectroscopy and density functional theory (DFT) calculations. Electron density topological and NBO analysis has demonstrated the importance of non-covalent interactions, characterised by (3, -1) bond critical points (BCPs), between the oxygen and sulfur atoms on the thiazolidine ring with the aryl substitutents in stabilizing the transition states. The energetic activation barriers to rotation have also been determined using computational results; rotational barriers for 3-(o-chlorophenyl)-5-methyl-rhodanine (3S) and 3-(o-tolyl)-5-methyl-rhodanine (6S) were determined experimentally based on NMR separation of the diastereoisomeric pairs, and the first-order rate constants used to derive the value of the rotational barrier from the Eyring equation.
Collapse
Affiliation(s)
- Yeliz Aydeniz
- Department of Chemistry, Bogazici University, Bebek, Istanbul, Turkey
| | | | | | | | | | | | | |
Collapse
|
463
|
Hu SW, Wang Y, Wang XY, Chu TW, Liu XQ. Gas-Phase Reactions between Silane and Ammonia: A Theoretical Study. J Phys Chem A 2003. [DOI: 10.1021/jp035684m] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shao-Wen Hu
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, China 100871
| | - Yi Wang
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, China 100871
| | - Xiang-Yun Wang
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, China 100871
| | - Ti-Wei Chu
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, China 100871
| | - Xin-Qi Liu
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, China 100871
| |
Collapse
|
464
|
Fung WK, Huang X, Man ML, Ng SM, Hung MY, Lin Z, Lau CP. Dihydrogen-bond-promoted catalysis: catalytic hydration of nitriles with the indenylruthenium hydride complex (eta(5)-C(9)H(7))Ru(dppm)H (dppm = bis(diphenylphosphino)methane). J Am Chem Soc 2003; 125:11539-44. [PMID: 13129356 DOI: 10.1021/ja034050q] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The indenylruthenium hydride complex (eta(5)-C(9)H(7))Ru(dppm)H was found to be active in catalyzing the hydration of nitriles to amides. The chloro analogue (eta(5)-C(9)H(7))Ru(dppm)Cl was, however, found to be inactive. Density functional theory calculations at the B3LYP level provide explanations for the effectiveness of the hydride complex and the ineffectiveness of the chloro complex in the catalysis. It is learned that the presence of a Ru-H.H-OH dihydrogen-bonding interaction in the transition state lowers the reaction barrier in the case of (eta(5)-C(9)H(7))Ru(dppm)H, but in the chloro system, the corresponding transition state does not contain this type of interaction and the reaction barrier is much higher. A similar dihydrogen-bond-promoting effect is believed to be responsible for the catalytic activity of the hydrotris(pyrazolyl)borato (Tp) ruthenium complex TpRu(PPh(3))(CH(3)CN)H in CH(3)CN hydration. The chloro analogue TpRu(PPh(3))(CH(3)CN)Cl shows no catalytic activity.
Collapse
Affiliation(s)
- Wai Kit Fung
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | | | | | | | | | | | | |
Collapse
|
465
|
Cybulski H, Pecul M, Sadlej J, Helgaker T. Characterization of dihydrogen-bonded D–H⋯H–A complexes on the basis of infrared and magnetic resonance spectroscopic parameters. J Chem Phys 2003. [DOI: 10.1063/1.1597633] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
466
|
Custelcean R, Dreger ZA. Dihydrogen Bonding under High Pressure: A Raman Study of BH3NH3Molecular Crystal. J Phys Chem B 2003. [DOI: 10.1021/jp035267+] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
467
|
Takei I, Nishibayashi Y, Ishii Y, Mizobe Y, Uemura S, Hidai M. Novel catalytic hydrogenolysis of silyl enol ethers by the use of acidic ruthenium dihydrogen complexes. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00470-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
468
|
Roesler R, Piers WE, Parvez M. Synthesis, structural characterization and reactivity of the amino borane 1-(NPh2)-2-[B(C6F5)2]C6H4. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00384-x] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
469
|
Abstract
A theoretical study of the properties of the linear LiH dimer was undertaken. In this dimer, an unusual type of hydrogen bonding (termed "inverse" hydrogen bonding by some authors), which involves the hydrogen bonded molecule acting as an electron donor (rather than as a proton donor), is exhibited. The optimized geometry, dipole moment, interaction energy, atomic charges, harmonic vibrational frequencies, and frequency shifts for the dimer are computed at the SCF, MP2, and QCISD levels of theory using mainly a 6-31++G(d,p) basis set. We also examined the relative stability of the mono-deuterated isotopomers of linear (LiH)(2), i.e., Li-H...Li-D and Li-D...Li-H. Analysis of the normal vibrational modes, changes in the partial atomic charges, and changes in the vibrational frequencies of LiH on complexation were used to gain insight into the bonding and properties of the linear LiH dimer and its isotopomers.
Collapse
Affiliation(s)
- Sean A C McDowell
- Department of Biological and Chemical Sciences, University of the West Indies, Cave Hill Campus, P.O. Box 64, Bridgetown, Barbados.
| |
Collapse
|
470
|
Kar T, Scheiner S. Comparison between hydrogen and dihydrogen bonds among H3BNH3, H2BNH2, and NH3. J Chem Phys 2003. [DOI: 10.1063/1.1580093] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
471
|
Single-electron hydrogen bonds in the methyl radical complexes H3C⋯HF and H3C⋯HCCH: an ab initio study. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00822-4] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
472
|
Robertson KN, Knop O, Cameron TS. C-H···H-C interactions in organoammonium tetraphenylborates: another look at dihydrogen bonds. CAN J CHEM 2003. [DOI: 10.1139/v03-080] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The crystal structures of the tetraphenylborates of the dabcoH+, guanidinium (MeCN solvate), and biguanidinium cations are shown to contain a variety of C-H···H-C dihydrogen (DB) bonds of nominally zero polarity, as well as a variety of N-H···N, C-H···N, N-H···Ph, and C-H···Ph hydrogen (HB) bonds. These intermolecular bonds have been characterized topologically after multipole refinement of the structures. The coexistence of the DBs and HBs in each of the structures makes it possible to establish their relative strength hierarchy. It also illustrates the importance of the DBs in satisfying the tendency of these structures to maximize the total intermolecular bonding engagement. To compare the above DBs with other DBs, the results of an extensive set of MP2/6-31G(d,p) calculations (supplied by I. Alkorta) were analyzed for reference correlations between the bond-critical parameters. Thus, for an X-H···H-Y bond, the difference Δε(H)m between the Mulliken charges on the H atoms in the uncomplexed X-H and H-Y components correlates quite well with the X-H···H-Y parameters and can be used for predicting the topological strength of an X-H···H-Y bond. The use of the difference Δε(H)c in the bond does not appear to change the correlation significantly; closer correlations are observed when the amount of charge transferred on formation of the H···H bond is used instead of Δε(H)m or Δε(H)c. Bonding interactions are obtained even between like or symmetry-related H atoms as a consequence of induced-dipole interactions, which accounts for the existence of the above intermolecular C-H···H-C bonds with d(H···H) = 2.182.57 Å, electron density at the bond-critical point of ~0.050.08 e/Å3, and a rough estimate of the H···H binding energy of ~1-5 kcal/mol. Examination of the bond-critical parameters of X-H···H-Y bonds also suggests a criterion of stability of these bonds with respect to the transition from non-shared (closed-shell) X-H···H-Y interaction to covalent (shared-shell) X···H-H···Y interaction. This transition appears to be discontinuous.Key words: bond-critical parameters, bond topology, dihydrogen bonds, hydrogen bonds, organoammonium tetraphenylborates.
Collapse
|
473
|
Trudel S, Gilson DFR. High-pressure Raman spectroscopic study of the ammonia-borane complex. Evidence for the dihydrogen bond. Inorg Chem 2003; 42:2814-6. [PMID: 12691593 DOI: 10.1021/ic026275s] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Raman spectra of the ammonia-borane complex, NH(3)BH(3), have been investigated as a function of pressure up to 40 kbar. Vibrational modes involving the NH(3) group show negative pressure dependences, supporting the existence of the dihydrogen bond, but the vibrations of the BH(3) group have a positive dependence. Two transitions were observed in the solid phase under pressure, in contrast to the temperature behavior, where a single transition occurs. Factor group splitting occurs for the degenerate vibrations, and this allows the correct assignment of the observed vibrations.
Collapse
Affiliation(s)
- Simon Trudel
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, H3A 2K6 Canada
| | | |
Collapse
|
474
|
|
475
|
Curtis CJ, Miedaner A, Ciancanelli R, Ellis WW, Noll BC, Rakowski DuBois M, DuBois DL. [Ni(Et2PCH2NMeCH2PEt2)2]2+ as a functional model for hydrogenases. Inorg Chem 2003; 42:216-27. [PMID: 12513098 DOI: 10.1021/ic020610v] [Citation(s) in RCA: 199] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of Et(2)PCH(2)N(Me)CH(2)PEt(2) (PNP) with [Ni(CH(3)CN)(6)](BF(4))(2) results in the formation of [Ni(PNP)(2)](BF(4))(2), which possesses both hydride- and proton-acceptor sites. This complex is an electrocatalyst for the oxidation of hydrogen to protons, and stoichiometric reaction with hydrogen forms [HNi(PNP)(PNHP)](BF(4))(2), in which a hydride ligand is bound to Ni and a proton is bound to a pendant N atom of one PNP ligand. The free energy associated with this reaction has been calculated to be -5 kcal/mol using a thermodynamic cycle. The hydride ligand and the NH proton undergo rapid intramolecular exchange with each other and intermolecular exchange with protons in solution. [HNi(PNP)(PNHP)](BF(4))(2) undergoes reversible deprotonation to form [HNi(PNP)(2)](BF(4)) in acetonitrile solutions (pK(a) = 10.6). A convenient synthetic route to the PF(6)(-) salt of this hydride involves the reaction of PNP with Ni(COD)(2) to form Ni(PNP)(2), followed by protonation with NH(4)PF(6). A pK(a) of value of 22.2 was measured for this hydride. This value, together with the half-wave potentials of [Ni(PNP)(2)](BF(4))(2), was used to calculate homolytic and heterolytic Ni-H bond dissociation free energies of 55 and 66 kcal/mol, respectively, for [HNi(PNP)(2)](PF(6)). Oxidation of [HNi(PNP)(2)](PF(6)) has been studied by cyclic voltammetry, and the results are consistent with a rapid migration of the proton from the Ni atom of the resulting [HNi(PNP)(2)](2+) cation to the N atom to form [Ni(PNP)(PNHP)](2+). Estimates of the pK(a) values of the NiH and NH protons of these two isomers indicate that proton migration from Ni to N should be favorable by 1-2 pK(a) units. Cyclic voltammetry and proton exchange studies of [HNi(depp)(2)](PF(6)) (where depp is Et(2)PCH(2)CH(2)CH(2)PEt(2)) are also presented as control experiments that support the important role of the bridging N atom of the PNP ligand in the proton exchange reactions observed for the various Ni complexes containing the PNP ligand. Similarly, structural studies of [Ni(PNBuP)(2)](BF(4))(2) and [Ni(PNP)(dmpm)](BF(4))(2) (where PNBuP is Et(2)PCH(2)N(Bu)CH(2)PEt(2) and dmpm is Me(2)PCH(2)PMe(2)) illustrate the importance of tetrahedral distortions about Ni in determining the hydride acceptor ability of Ni(II) complexes.
Collapse
Affiliation(s)
- Calvin J Curtis
- National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, CO 80401-3393, USA
| | | | | | | | | | | | | |
Collapse
|
476
|
Hao XY, Li ZR, Wu D, Wang Y, Li ZS, Sun CC. A theoretical prediction on intermolecular monoelectron dihydrogen bond H⋯e⋯H in the cluster anion (FH)2{e}(HF)2. J Chem Phys 2003. [DOI: 10.1063/1.1523907] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
477
|
Man ML, Zhou Z, Ng SM, Lau CP. Synthesis, characterization and reactivity of heterobimetallic complexes (η5-C5R5)Ru(CO)(μ-dppm)M(CO)2(η5-C5H5) (R = H, CH3; M = Mo, W). Interconversion of hydrogen/carbon dioxide and formic acid by these complexes. Dalton Trans 2003. [DOI: 10.1039/b306835h] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
478
|
Ramnial T, Jong H, McKenzie ID, Jennings M, Clyburne JAC. An imidazol-2-ylidene borane complex exhibiting inter-molecular [C–Hδ+⋯Hδ−–B] dihydrogen bonds. Chem Commun (Camb) 2003. [DOI: 10.1039/b301416a] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
479
|
Abdur-Rashid K, Clapham SE, Hadzovic A, Harvey JN, Lough AJ, Morris RH. Mechanism of the hydrogenation of ketones catalyzed by trans-dihydrido(diamine)ruthenium II complexes. J Am Chem Soc 2002; 124:15104-18. [PMID: 12475357 DOI: 10.1021/ja016817p] [Citation(s) in RCA: 435] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The complexes trans-RuH(Cl)(tmen)(R-binap) (1) and (OC-6-43)-RuH(Cl)(tmen)(PPh(3))(2) (2) are prepared by the reaction of the diamine NH(2)CMe(2)CMe(2)NH(2) (tmen) with RuH(Cl)(PPh(3))(R-binap) and RuH(Cl)(PPh(3))(3), respectively. Reaction of KHB(sec)Bu(3) with 1 yields trans-Ru(H)(2)(R-binap)(tmen) (5) while reaction of KHB(sec)Bu(3) or KO(t)Bu with 2 under Ar yields the new hydridoamido complex RuH(PPh(3))(2)(NH(2)CMe(2)CMe(2)NH) (4). Complex 4 has a distorted trigonal bipyramidal geometry with the amido nitrogen in the equatorial plane. Loss of H(2) from 5 results in the related complex RuH(R-binap)(NH(2)CMe(2)CMe(2)NH) (3). Reaction of H(2) with 4 yields the trans-dihydride (OC-6-22)-Ru(H)(2)(PPh(3))(2)(tmen)(6). Calculations support the assignment of the structures. The hydrogenation of acetophenone is catalyzed by 5 or 4 in benzene or 2-propanol without the need for added base. For 5 in benzene at 293 K over the ranges of concentrations [5] = 10(-)(4) to 10(-)(3) M, [ketone] = 0.1 to 0.5 M, and of pressures of H(2) = 8 to 23 atm, the rate law is rate = k[5][H(2)] with k = 3.3 M(-1) s(1), DeltaH++ = 8.5 +/- 0.5 kcal mol(-1), DeltaS++ = -28 +/- 2 cal mol(-1) K(-1). For 4 in benzene at 293 K over the ranges of concentrations [4] = 10(-4) to 10(-3) M, [ketone] 0.1 to 0.7 M, and of pressures of H(2) = 1 to 6 atm, the preliminary rate law is rate = k[4][H(2)] with k = 1.1 x 10(2) M(-1) s(-1), DeltaH++ = 7.6 +/- 0.3 kcal mol(-1), DeltaS++ = -23 +/- 1 cal mol(-1) K(-1). Both theory and experiment suggest that the intramolecular heterolytic splitting of dihydrogen across the polar Ru=N bond of the amido complexes 3 and 4 is the turn-over limiting step. A transition state structure and reaction energy profile is calculated. The transfer of H(delta+)/H(delta-) to the ketone from the RuH and NH groups of 5 in a Noyori metal-ligand bifunctional mechanism is a fast process and it sets the chirality as (R)-1-phenylethanol (62-68% ee) in the hydrogenation of acetophenone. The rate of hydrogenation of acetophenone catalyzed by 5 is slower and the ee of the product is low (14% S) when 2-propanol is used as the solvent, but both the rate and ee (up to 55% R) increase when excess KO(t)Bu is added. The formation of ruthenium alkoxide complexes in 2-propanol might explain these observations. Alkoxide complexes [RuP(2)]H(OR)(tmen), [RuP(2)] = Ru(R-binap) or Ru(PPh(3))(2), R= (i) Pr, CHPhMe, (t)Bu, are observed by reacting the alcohols (i)PrOH, phenylethanol, and (t)BuOH with the dihydrides 5 and 6, respectively, under Ar. In the absence of H(2), the amido complexes 3 and 4 react with acetophenone to give the ketone adducts [RuP(2)]H(O=CPhMe)(NH(2)CMe(2)CMe(2)NH) in equilibrium with the enolate complexes trans- [RuP(2)](H)(OCPh=CH(2))(tmen) and eventually the decomposition products [RuP(2)]H(eta(5)-CH(2)CPhCHCPhO), with the binap complex characterized crystallographically. In general, proton transfer from the weakly acidic molecules dihydrogen, alcohol, or acetophenone to the amido nitrogen of complexes 3 and 4 is favored in two ways when the molecule coordinates to ruthenium: (1) an increase in acidity of the molecule by the Lewis acidic metal and (2) an increase in the basicity of the amido nitrogen caused by its pyramidalization. The formato complexes trans-[RuP(2)]H(OCHO)(tmen) were prepared by reacting the respective complex 4 or 5 with formic acid. The crystal structure of RuH(OCHO)(PPh(3))(2)(tmen) displays similar features to the calculated transition state for H(delta+)/H(delta-) transfer to the ketone in the catalytic cycle.
Collapse
Affiliation(s)
- Kamaluddin Abdur-Rashid
- Department of Chemistry, Davenport Laboratories, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
| | | | | | | | | | | |
Collapse
|
480
|
|
481
|
Hascall T, Baik MH, Bridgewater BM, Shin JH, Churchill DG, Friesner RA, Parkin G. A non-classical hydrogen bond in the molybdenum arene complex [eta 6-C6H5C6H3(Ph)OH]Mo(PMe3)3: evidence that hydrogen bonding facilitates oxidative addition of the O-H bond. Chem Commun (Camb) 2002:2644-5. [PMID: 12510278 DOI: 10.1039/b208678f] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mo(PMe3)6 reacts with 2,6-Ph2C6H3OH to give the eta 6-arene complex [eta 6-C6H5C6H3(Ph)OH]Mo(PMe3)3 which exhibits a non-classical Mo...H-OAr hydrogen bond; DFT calculations indicate that the hydrogen bonding interaction facilitates oxidative addition of the O-H bond to give [eta 6,eta 1-C6H5C6H3(Ph)O]Mo(PMe3)2H.
Collapse
Affiliation(s)
- Tony Hascall
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | | | | | | | | | | | | |
Collapse
|
482
|
Binotti B, Macchioni* A, Zuccaccia C, Zuccaccia D. Application of NOE and PGSE NMR Methodologies to Investigate Non-Covalent Intimate Inorganic Adducts in Solution. COMMENT INORG CHEM 2002. [DOI: 10.1080/02603590216079] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
483
|
Atheaux I, Delpech F, Donnadieu B, Sabo-Etienne S, Chaudret B, Hussein K, Barthelat JC, Braun T, Duckett SB, Perutz RN. Exchange Processes in Complexes with Two Ruthenium (η2-Silane) Linkages: Role of the Secondary Interactions between Silicon and Hydrogen Atoms. Organometallics 2002. [DOI: 10.1021/om0206148] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Isabelle Atheaux
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Fabien Delpech
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Bruno Donnadieu
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Sylviane Sabo-Etienne
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Bruno Chaudret
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Khansaa Hussein
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Jean-Claude Barthelat
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Thomas Braun
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Simon B. Duckett
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Robin N. Perutz
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France, Laboratoire de Physique Quantique, IRSAMC (UMR 5626), Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France, and Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| |
Collapse
|
484
|
Fe-H…H-C Dihydrogen Bondings: Synthesis and Structure of trans-[FeH(NCSe)(dppe)2](dppe=Ph2PCH2CH2PPh2. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2002. [DOI: 10.5012/jkcs.2002.46.5.427] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
485
|
Vysotsky YB, Bryantsev VS, Fainerman VB, Vollhardt D. Quantum Chemical Analysis of the Thermodynamics of 2D Cluster Formation of Odd n-Alcohols at the Air/Water Interface. J Phys Chem B 2002. [DOI: 10.1021/jp021352q] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu. B. Vysotsky
- Donbas Academy of Civil Engineering and Architecture, 2 Derzavina Str., Makijivka 86123, Ukraine, International Medical Physicochemical Centre, Donetsk Medical University, 16 Ilych Av., Donetsk 83003, Ukraine, and Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam/Golm, Germany
| | - V. S. Bryantsev
- Donbas Academy of Civil Engineering and Architecture, 2 Derzavina Str., Makijivka 86123, Ukraine, International Medical Physicochemical Centre, Donetsk Medical University, 16 Ilych Av., Donetsk 83003, Ukraine, and Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam/Golm, Germany
| | - V. B. Fainerman
- Donbas Academy of Civil Engineering and Architecture, 2 Derzavina Str., Makijivka 86123, Ukraine, International Medical Physicochemical Centre, Donetsk Medical University, 16 Ilych Av., Donetsk 83003, Ukraine, and Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam/Golm, Germany
| | - D. Vollhardt
- Donbas Academy of Civil Engineering and Architecture, 2 Derzavina Str., Makijivka 86123, Ukraine, International Medical Physicochemical Centre, Donetsk Medical University, 16 Ilych Av., Donetsk 83003, Ukraine, and Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam/Golm, Germany
| |
Collapse
|
486
|
Hydrogen bonding. Part 80. Molecular orbital evaluation of C–H hydrogen bonding in tetramethylammonium tetrahydroborate. J Mol Struct 2002. [DOI: 10.1016/s0022-2860(02)00325-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
487
|
McDowell SAC, Forde TS. Isotope effects in linear dihydrogen bonded complexes containing LiH. J Chem Phys 2002. [DOI: 10.1063/1.1503774] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
488
|
Alkorta I, Elguero J, Mó O, Yáñez M, Del Bene JE. Ab Initio Study of the Structural, Energetic, Bonding, and IR Spectroscopic Properties of Complexes with Dihydrogen Bonds. J Phys Chem A 2002. [DOI: 10.1021/jp021159w] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Janet E. Del Bene
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, and Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555
| |
Collapse
|
489
|
|
490
|
The use of Kitaigorodskii's Aufbau principle in the solid-state study of crystalline borane compounds. A preliminary account. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(02)01587-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
491
|
Shubina E, Bakhmutova E, Filin A, Sivaev I, Teplitskaya L, Chistyakov A, Stankevich I, Bakhmutov V, Bregadze V, Epstein L. Dihydrogen bonding of decahydro-closo-decaborate(2−) and dodecahydro-closo-dodecaborate(2−) anions with proton donors: experimental and theoretical investigation. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(02)01380-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
492
|
Merino G, Bakhmutov VI, Vela A. Do Cooperative Proton−Hydride Interactions Explain the Gas−Solid Structural Difference of BH3NH3? J Phys Chem A 2002. [DOI: 10.1021/jp026087n] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gabriel Merino
- Departamento de Química, Centro de Investigación y de Estudios Avanzados. A.P. 14-740, C.P. 07000, México D.F, México
| | - Vladimir I. Bakhmutov
- Departamento de Química, Centro de Investigación y de Estudios Avanzados. A.P. 14-740, C.P. 07000, México D.F, México
| | - Alberto Vela
- Departamento de Química, Centro de Investigación y de Estudios Avanzados. A.P. 14-740, C.P. 07000, México D.F, México
| |
Collapse
|
493
|
Hu S, Kim J, Tarakeshwar P, Kim KS. Insights into the Nature of SiH4−BH3 Complex: Theoretical Investigation of New Mechanistic Pathways Involving SiH3• and BH4• Radicals. J Phys Chem A 2002. [DOI: 10.1021/jp025580w] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shaowen Hu
- National Creative Research Initiative Center for Superfunctional Materials, Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| | - Jongseob Kim
- National Creative Research Initiative Center for Superfunctional Materials, Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| | - P. Tarakeshwar
- National Creative Research Initiative Center for Superfunctional Materials, Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| | - Kwang S. Kim
- National Creative Research Initiative Center for Superfunctional Materials, Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| |
Collapse
|
494
|
Landau SE, Groh KE, Lough AJ, Morris RH. Large effects of ion pairing and protonic-hydridic bonding on the stereochemistry and basicity of crown-, azacrown-, and cryptand-222-potassium salts of anionic tetrahydride complexes of iridium(III). Inorg Chem 2002; 41:2995-3007. [PMID: 12033911 DOI: 10.1021/ic0255149] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The compounds [K(Q)][IrH(4)(PR(3))(2)] (Q = 18-crown-6, R = Ph, (i)Pr, Cy; Q = aza-18-crown-6, R = (i)Pr; Q = 1,10-diaza-18-crown-6, R = Ph, (i)Pr, Cy; Q = cryptand-222, R = (i)Pr, Cy) were formed in the reactions of IrH(5)(PR(3))(2) with KH and Q. In solution, the stereochemistry of the salts of [IrH(4)(PR(3))(2)](-) is surprisingly sensitive to the countercation: either trans as the potassium cryptand-222 salts (R = Cy, (i)Pr) or exclusively cis (R = Cy, Ph) as the crown- and azacrown-potassium salts or a mixture of cis and trans (R = (i)Pr). There is IR evidence for protonic-hydridic bonding between the NH of the aza salts and the iridium hydride in solution. In single crystals of [K(18-crown-6)][cis-IrH(4)(PR(3))(2)] (R = Ph, (i)Pr) and [K(aza-18-crown-6)][cis-IrH(4)(P(i)Pr(3))(2)], the potassium bonds to three hydrides on a face of the iridium octahedron according to X-ray diffraction studies. Significantly, [K(1,10-diaza-18-crown-6)][trans-IrH(4)(P(i)Pr(3))(2)] crystallizes in a chain structure held together by protonic-hydridic bonds. In [K(1,10-diaza-18-crown-6)][cis-IrH(4)(PPh(3))(2)], the potassium bonds to two hydrides so that one NH can form an intra-ion-pair protonic-hydridic hydrogen bond while the other forms an inter-ion-pair NH.HIr hydrogen bond to form chains through the lattice. Thus, there is a competition between the potassium and NH groups in forming bonds with the hydrides on iridium. The more basic P(i)R(3) complex has the lower N-H stretch in the IR spectrum because of stronger N[bond]H...HIr hydrogen bonding. The trans complexes have very low Ir-H wavenumbers (1670-1680) due to the trans hydride ligands. The [K(cryptand)](+) salt of [trans-IrH(4)(P(i)Pr(3))(2)](-) reacts with WH(6)(PMe(2)Ph)(3) (pK(alpha)(THF) 42) to give an equilibrium (K(eq) = 1.6) with IrH(5)(P(i)Pr(3))(2) and [WH(5)(PMe(2)Ph)(3)](-) while the same reaction of WH(6)(PMe(2)Ph)(3) with the [K(18-crown-6)](+) salt of [cis-IrH(4)(P(i)Pr(3))(2)](-) has a much larger equilibrium constant (K(eq) = 150) to give IrH(5)(P(i)Pr(3))(2) and [WH(5)(PMe(2)Ph)(3)](-); therefore, the tetrahydride anion displays an unprecedented increase (about 100-fold) in basicity with a change from [K(crypt)](+) to [K(crown)](+) countercation and a change from trans to cis stereochemistry. The acidity of the pentahydrides decrease in THF as IrH(5)(P(i)Pr(3))(2)/[K(crypt)][trans-IrH(4)(P(i)Pr(3))(2)] (pK(alpha)(THF) = 42) > IrH(5)(PCy(3))(2)/[K(crypt)][trans-IrH(4)(PCy(3))(2)] (pK(alpha)(THF) = 43) > IrH(5)(P(i)Pr(3))(2)/[K(crown)][cis-IrH(4)(P(i)Pr(3))(2)] (pK(alpha)(THF) = 44) > IrH(5)(PCy(3))(2)/[K(crown)][cis-IrH(4)(PCy(3))(2)]. The loss of PCy(3) from IrH(5)(PCy(3))(2) can result in mixed ligand complexes and H/D exchange with deuterated solvents. Reductive cleavage of P-Ph bonds is observed in some preparations of the PPh(3) complexes.
Collapse
Affiliation(s)
- Shaun E Landau
- Davenport Laboratory, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6 Canada
| | | | | | | |
Collapse
|
495
|
Lam YF, Yin C, Yeung CH, Ng SM, Jia G, Lau CP. Attenuation of Intramolecular Ru−H···H−N Dihydrogen Bonding in Aminocyclopentadienyl Ruthenium Hydride Complexes Containing Phosphite Ligands. Organometallics 2002. [DOI: 10.1021/om010966z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yat Fai Lam
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Chuanqi Yin
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Chi Hung Yeung
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Siu Man Ng
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Guochen Jia
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Chak Po Lau
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| |
Collapse
|
496
|
Tamm M, Bannenberg T, Dressel B, Fröhlich R, Holst C. Molybdenum complexes with linked cycloheptatrienyl-phenolate ligands. Inorg Chem 2002; 41:47-59. [PMID: 11782143 DOI: 10.1021/ic010902g] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The tropylium salt (2-hydroxy-3,5-dimethylphenyl)cycloheptatrienylium tetrafluoroborate (3) has been synthesized in three steps from THP-protected 2,4-dimethylphenol and tropylium tetrafluoroborate, (C(7)H(7))BF(4). In CH(2)Cl(2) solution, the unexpected formation of tricyclic 2,4-dimethylbenzo[b]cyclohepta[d]furanylium tetrafluoroborate (5) has been observed, which must have formed from 3 by loss of H(2). 5 was characterized by an X-ray crystal structure determination and could independently be synthesized by treatment of 3 with NaHCO(3) to give 2,4-dimethylbenzo[b]cyclohepta[d]furan (4) followed by acidification with HBF(4).Et(2)O. The arene transfer reaction of 3 with [(eta-p-xylene)Mo(CO)(3)] furnished the cycloheptatrienyl complex [(HOC(6)H(2)Me(2)-eta(7)-C(7)H(6))Mo(CO)(3)]BF(4) (6), which could be converted into the chiral chelate complexes [(OC6H2Me2-eta7-C7H6)Mo(CO)(PR3)](9a, R = Ph; 9b, R = c-C(6)H(11); 9c, i-Pr) by subsequent treatment with NaI, PR(3), and NaH. The linked cycloheptatienyl-phenolate ligand in 9a could be protonated at the coordinated oxygen atom employing HBF(4).Et(2)O to yield [(HOC6H2Me2-eta7-C7H6)Mo(CO)(PPh3)]-BF4 (10). In 10, the appended phenol group is coordinated in a hemilabile fashion, which allowed the introduction of 2,6-dimethylphenyl isocyanide and CO and formation of complexes [(HOC(6)H(2)Me(2)-eta(7)-C(7)H(6))Mo(CO)(PPh(3))L]BF(4) (11, L = XyNC; 12, L = CO). On thermal reaction of [(HOC(6)H(2)Me(2)-eta(7)-C(7)H(6))Mo(CO)(2)I] (7) with dppe, the addition of the diphosphine was observed together with the simultaneous formation of the molydenum-oxygen bond to yield [(OC6H2Me2-eta3-C7H6)Mo(CO)2(dppe)] (13), in which the cycloheptatrienyl ring has reduced its hapticity from seven to three. The pseudooctahedral complex 13 exhibits an interesting fluxional behavior in solution, which has been studied by means of variable-temperature (31)P and (1)H NMR spectroscopy. A eta(3) --> eta(7) hapticity reversion could be achieved by UV irradiation of a solution of 13 in THF to give the electron-rich complex [(OC6H2Me2-eta7-C7H6)Mo(dppe)] (14). 14 was readily oxidized with ferrocenium hexafluorophosphate, and the resulting paramagnetic monocationic complex 15 has been studied by means of ESR spectroscopy and X-ray diffraction. In addition, the X-ray crystal structures of complexes 9a, 10.2CH(2)Cl(2), 12, and 13 are reported.
Collapse
Affiliation(s)
- Matthias Tamm
- Anorganisch-Chemisches Institut, Westfälische Wilhelms-Universität, Münster, Germany.
| | | | | | | | | |
Collapse
|
497
|
Custelcean R, Vlassa M, Jackson JE. Supramolecular synthesis through dihydrogen bonds: self-assembly of controlled architectures from NaBH4 x poly(2-hydroxyethyl)cyclen building blocks. Chemistry 2002; 8:302-8. [PMID: 11822461 DOI: 10.1002/1521-3765(20020104)8:1<302::aid-chem302>3.0.co;2-k] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A systematic investigation of molecular structures/supramolecular organization relationships in dihydrogen-bonded complexes comprising NaBH4 and poly-2-hydroxyethyl-cyclen (poly-HEC) building blocks is reported. Like in the prototype compound 1, a (NaBH4-poly-HEC)2 dimeric arrangement has been found in the analogous structures 3 and 5, but not in compound 2, which lacks dihydrogen bonds. The exact connectivity of the dimers is determined by a complex interplay of noncovalent interactions such as OH...HB dihydrogen bonds, OH...O conventional hydrogen bonds, Na-O and Na-N coordinative bonds, and dispersion interactions. The persistent recurrence of this general supramolecular motif permits controlled assembly of extended networks with desired architectures, by the use of appropriate spacers for linking the dimers, as demonstrated by the solid-state structure of 7. Additionally, the intrinsic solid-state reactivity of these dihydrogen-bonded networks makes this approach a promising strategy for the rational construction of functional extended covalent solids.
Collapse
Affiliation(s)
- Radu Custelcean
- Department of Chemistry, Michigan State University, East Lansing 48824, USA.
| | | | | |
Collapse
|
498
|
Aime S, Diana E, Gobetto R, Milanesio M, Valls E, Viterbo D. Structural and Spectroscopic Study of the Dihydrogen Bond in an Imine Triosmium Complex. Organometallics 2001. [DOI: 10.1021/om010650r] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Aime
- Dipartimento Chimica I.F.M., Università di Torino, Via P. Giuria 7, 10125 Torino, Italy, Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Corso T. Borsalino 54, 15100 Alessandria, Italy, and Unitat de Quimica Inorganica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain
| | - E. Diana
- Dipartimento Chimica I.F.M., Università di Torino, Via P. Giuria 7, 10125 Torino, Italy, Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Corso T. Borsalino 54, 15100 Alessandria, Italy, and Unitat de Quimica Inorganica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain
| | - R. Gobetto
- Dipartimento Chimica I.F.M., Università di Torino, Via P. Giuria 7, 10125 Torino, Italy, Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Corso T. Borsalino 54, 15100 Alessandria, Italy, and Unitat de Quimica Inorganica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain
| | - M. Milanesio
- Dipartimento Chimica I.F.M., Università di Torino, Via P. Giuria 7, 10125 Torino, Italy, Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Corso T. Borsalino 54, 15100 Alessandria, Italy, and Unitat de Quimica Inorganica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain
| | - E. Valls
- Dipartimento Chimica I.F.M., Università di Torino, Via P. Giuria 7, 10125 Torino, Italy, Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Corso T. Borsalino 54, 15100 Alessandria, Italy, and Unitat de Quimica Inorganica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain
| | - D. Viterbo
- Dipartimento Chimica I.F.M., Università di Torino, Via P. Giuria 7, 10125 Torino, Italy, Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Corso T. Borsalino 54, 15100 Alessandria, Italy, and Unitat de Quimica Inorganica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain
| |
Collapse
|