301
|
Tárkányi G, Király P, Soós T, Varga S. Active Conformation in Amine-Thiourea Bifunctional Organocatalysis Preformed by Catalyst Aggregation. Chemistry 2012; 18:1918-22. [DOI: 10.1002/chem.201102701] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 12/01/2011] [Indexed: 11/08/2022]
|
302
|
Aliev AE, Mia ZA, Khaneja HS, King FD. Structures in Solutions from Joint Experimental-Computational Analysis: Applications to Cyclic Molecules and Studies of Noncovalent Interactions. J Phys Chem A 2012; 116:1093-109. [DOI: 10.1021/jp211083f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Abil E. Aliev
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Zakirin A. Mia
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Harmeet S. Khaneja
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Frank D. King
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| |
Collapse
|
303
|
X-ray crystal structures and conformational analysis of cyclic acetals derived from tartaric acid and rigid spacer units. Struct Chem 2012. [DOI: 10.1007/s11224-011-9934-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
304
|
Fischer C, Seichter W, Weber E. Structural conditions required for the bridge lithiation and substitution of a basic calix[4]arene. Beilstein J Org Chem 2012; 7:1602-8. [PMID: 22238537 PMCID: PMC3252863 DOI: 10.3762/bjoc.7.188] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Accepted: 11/10/2011] [Indexed: 11/23/2022] Open
Abstract
Lithiation and subsequent reaction with CO2 was applied to calix[4]arenes with different, equal or mixed, ether functions at the lower-rim site as well as tert-butylated or non-tert-butylated upper-rim positions. Whereas this reaction fails for symmetric calix[4]arene ethers with alkoxy residues greater than methoxy, the carboxylation of mixed methoxy-propoxy calixarene ethers is possible. In connection with this, several new monobridge-substituted calix[4]arenes were characterized with respect to their conformational behaviour in solution and the X-ray crystal structure of one key intermediate is taken into consideration.
Collapse
Affiliation(s)
- Conrad Fischer
- Institut für Organische Chemie, TU Bergakademie Freiberg, Leipziger Str. 29, 09596 Freiberg, Germany
| | | | | |
Collapse
|
305
|
Sasaki T, Hisaki I, Tsuzuki S, Tohnai N, Miyata M. Halogen bond effect on bundling of hydrogen bonded 2-fold helical columns. CrystEngComm 2012. [DOI: 10.1039/c2ce26081f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
306
|
Kan WQ, Ma JF, Liu YY, Yang J. A series of coordination polymers based on 5-(2-carboxybenzyloxy) isophthalic acid and bis(imidazole) ligands: syntheses, topological structures and photoluminescent properties. CrystEngComm 2012. [DOI: 10.1039/c2ce06176g] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
307
|
Constable EC, Housecroft CE, Neuburger M, Vujovic S, Zampese JA, Zhang G. Cobalt(ii) coordination polymers with 4′-substituted 4,2′:6′,4′′- and 3,2′:6′,3′′-terpyridines: engineering a switch from planar to undulating chains and sheets. CrystEngComm 2012. [DOI: 10.1039/c2ce06609b] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
308
|
Abstract
Intermolecular attractive forces that are considerably weaker than hydrogen bonding and coordination complexation may be used in the design of new molecules that function as host molecules in the solid-state. Known literature examples of accidentally discovered hosts (clathrands), which do not involve strong interactions in their crystals, are identified and discussed. Their molecular symmetry and supramolecular interactions are analysed in order to identify structural features that facilitate and promote molecular inclusion. The solid-state properties of a family of designed compounds that embody these principles are then described. Prediction of their inclusion behaviour was 95 % successful and a wide variety of crystal packing arrangements were encountered. This is an inevitable consequence of competition between many different molecular interactions of comparable energy during the crystallisation process. The lowest energy combination of these host–host and host–guest associations generates the observed outcome. One consequence of this behaviour is that detailed prediction of a new clathrate crystal packing arrangement is extremely difficult. However, a second consequence is that crystal structure analysis provides a rich source of information about weak intermolecular forces and new supramolecular synthons that previously had remained hidden.
Collapse
|
309
|
|
310
|
Mazik M. Recent developments in the molecular recognition of carbohydrates by artificial receptors. RSC Adv 2012. [DOI: 10.1039/c2ra01138g] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
|
311
|
Cardellicchio C, Capozzi MAM, Alvarez-Larena A, Piniella JF, Capitelli F. Investigation on the weak interactions assembling the crystal structures of Betti bases. CrystEngComm 2012. [DOI: 10.1039/c2ce06295j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
312
|
McAdam CJ, Cameron SA, Hanton LR, Manning AR, Moratti SC, Simpson J. Probing CH-π(alkyne) interactions in a series of ethynylferrocenes. CrystEngComm 2012. [DOI: 10.1039/c2ce25267h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
313
|
Topolinski B, Schmidt BM, Kathan M, Troyanov SI, Lentz D. Corannulenylferrocenes: towards a 1D, non-covalent metal–organic nanowire. Chem Commun (Camb) 2012; 48:6298-300. [DOI: 10.1039/c2cc32275g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
314
|
Vibhute AM, Gonnade RG, Swathi RS, Sureshan KM. Strength from weakness: opportunistic CH⋯O hydrogen bonds differentially dictate the conformational fate in solid and solution states. Chem Commun (Camb) 2012; 48:717-9. [DOI: 10.1039/c1cc15051k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
315
|
Erra L, Tedesco C, Cipolletti VR, Annunziata L, Gaeta C, Brunelli M, Fitch AN, Knöfel C, Llewellyn PL, Atwood JL, Neri P. Acetylene and argon adsorption in a supramolecular organic zeolite. Phys Chem Chem Phys 2012; 14:311-7. [DOI: 10.1039/c1cp22569c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
316
|
Cîrcu M, Paşcanu V, Soran A, Braun B, Terec A, Socaci C, Grosu I. Solid state supramolecular assemblies of triol podands through H-bonds. CrystEngComm 2012. [DOI: 10.1039/c1ce05971h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
317
|
Kounavi KA, Moushi EE, Manos MJ, Papatriantafyllopoulou C, Tasiopoulos AJ, Nastopoulos V. Supramolecular patterns of cationic and neutral Ni(ii) complexes from the interplay of hydrogen-bonding, stacking interactions and metal-coordination motifs. CrystEngComm 2012. [DOI: 10.1039/c2ce25704a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
318
|
Hisaki I, Sasaki T, Tohnai N, Miyata M. Multipoint Approximation Method for Handedness Determination of Two-fold Helical Assemblies and Their Bundles. J SYN ORG CHEM JPN 2012. [DOI: 10.5059/yukigoseikyokaishi.70.908] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
319
|
Fuertes S, Brayshaw SK, Raithby PR, Schiffers S, Warren MR. New C∧N∧C Bis-Cyclometalated Platinum(II) Complexes: Synthesis, Structures, and Photophysical Properties. Organometallics 2011. [DOI: 10.1021/om200589q] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Sara Fuertes
- Department of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - Simon K. Brayshaw
- Department of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - Paul R. Raithby
- Department of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | | | - Mark R. Warren
- Department of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| |
Collapse
|
320
|
Jain V, Dhaked DK, Kasetti Y, Bharatam PV. Computational study on the conformational preferences in nateglinide. J PHYS ORG CHEM 2011. [DOI: 10.1002/poc.1956] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Vaibhav Jain
- Department of Pharmacoinformatics; National Institute of Pharmaceutical Education and Research (NIPER); Sector-67, S. A. S. Nagar; 160 062; Punjab; India
| | - Devendra Kumar Dhaked
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Sector-67, S. A. S. Nagar; 160 062; Punjab; India
| | - Yoganjaneyulu Kasetti
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Sector-67, S. A. S. Nagar; 160 062; Punjab; India
| | - P. V. Bharatam
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Sector-67, S. A. S. Nagar; 160 062; Punjab; India
| |
Collapse
|
321
|
Azov VA, Zeller M, Watat MLL, Xin Y. Thione vs. ketone: The influence of the chalcogenide on weak intermolecular interactions in crystal packing of 4,5-bis(bromomethyl)-1,3-dithiole-2-thione and 4,5-bis(bromomethyl)-1,3-dithiol-2-one. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.08.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
322
|
Pilia L, Espa D, Barsella A, Fort A, Makedonas C, Marchiò L, Mercuri ML, Serpe A, Mitsopoulou CA, Deplano P. Combined experimental and theoretical study on redox-active d8 metal dithione-dithiolato complexes showing molecular second-order nonlinear optical activity. Inorg Chem 2011; 50:10015-27. [PMID: 21939192 DOI: 10.1021/ic2007765] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis, characterization, NLO properties, and theoretical studies of the mixed-ligand dithiolene complexes of the nickel triad [M(II)(Bz(2)pipdt)(mnt)] (Bz(2)pipdt = 1,4-dibenzyl-piperazine-3,2-dithione, mnt = maleonitriledithiolato, M(II) = Ni, 1, Pd, 2, Pt, 3) are reported. Molecular structural characterization of 1-3 points out that four sulfur atoms are in a slightly distorted square-planar geometry. While the M-S bond distances are only slightly different, comparison of the C-C and C-S bonds in the C(2)S(2)MS(2)C(2) core allows us to point out a significant difference between the C-C and the C-S distances in Bz(2)pipdt and mnt. These findings suggest assigning a dithiolato character to mnt (pull ligand) and a dithione one (push ligand) to Bz(2)pipdt. Cyclic voltammetry of 1-3 exhibits two reversible reduction waves and a broad irreversible oxidation wave. These complexes are characterized in the visible region by a peak of moderately strong intensity, which undergoes negative solvatochromism. The molecular quadratic optical nonlinearities were determined by the EFISH technique, which provided the following values μβ(λ) (10(-48) esu) = -1436 (1), -1450 (2), and -1950 (3) converted in μβ(0) (10(-48) esu) = -463 (1), -684 (2), and -822 (3), showing that these complexes exhibit large negative second-order polarizabilities whose values depend on the metal, being highest for the Pt compound. DFT and TD-DFT calculations on 1-3 allow us to correlate geometries and electronic structures. Moreover, the first molecular hyperpolarizabilities have been calculated, and the results obtained support that the most appealing candidate as a second-order NLO chromophore is the platinum compound. This is due to (i) the most extensive mixture of the dithione/metal/dithiolato orbitals, (ii) the influence of the electric field of the solvent on the frontier orbitals that maximizes the difference in dipole moments between the excited and the ground state, and (iii) the largest oscillator strength in the platinum case vs nickel and palladium ones.
Collapse
Affiliation(s)
- Luca Pilia
- Dipartimento di Chimica Inorganica ed Analitica, Università di Cagliari, I-09042 Monserrato (Cagliari) Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
323
|
Liu Y, Gallo AA, Xu W, Bajpai R, Florián J. CH···π Interactions Do Not Contribute to Hydrogen Transfer Catalysis by Glycerol Dehydratase. J Phys Chem A 2011; 115:11162-6. [DOI: 10.1021/jp202687g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuemin Liu
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
| | - August A. Gallo
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
| | - Wu Xu
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
| | - Rakesh Bajpai
- Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
| | - Jan Florián
- Department of Chemistry, Loyola University Chicago, Chicago, Illinois 60626, United States
| |
Collapse
|
324
|
Ozawa T, Okazaki K, Kitaura K. CH/π hydrogen bonds play a role in ligand recognition and equilibrium between active and inactive states of the β2 adrenergic receptor: An ab initio fragment molecular orbital (FMO) study. Bioorg Med Chem 2011; 19:5231-7. [DOI: 10.1016/j.bmc.2011.07.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 07/01/2011] [Accepted: 07/02/2011] [Indexed: 10/17/2022]
|
325
|
A comparison of X-ray crystal structures including methyl 3,5-bis(hydroxymethyl)benzoate, its phenylethynyl extended derivative in polymorphous forms and the corresponding carboxylic acids. Struct Chem 2011. [DOI: 10.1007/s11224-011-9858-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
326
|
Ogoshi T, Demachi K, Kitajima K, Yamagishi TA. Selective complexation of n-alkanes with pillar[5]arene dimers in organic media. Chem Commun (Camb) 2011; 47:10290-2. [PMID: 21858335 DOI: 10.1039/c1cc14395f] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A pillar[5]arene dimer was synthesized by linking a mono-hydroxylated pillar[5]arene with 1,4-bis(bromomethyl)benzene. The pillar[5]arene dimer formed stronger complexes with n-alkanes than did a monomeric pillar[5]arene.
Collapse
Affiliation(s)
- Tomoki Ogoshi
- Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan.
| | | | | | | |
Collapse
|
327
|
Molecular and Crystal Structure of 7,7-Dimethyl-2-pyridin-4-yl-6,7-dihydro-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amine [1]. CRYSTALS 2011. [DOI: 10.3390/cryst1030136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
328
|
Li YM, Li YH, Zhang HS, Guo SS, Dong RT. Syntheses and structures of three chiral complexes derived from nucleophilic addition of L-proline to di-2-pyridyl ketone. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.602672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ya-Min Li
- a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P.R. China
- b State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, P.R. China
| | - Yong-Hong Li
- a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P.R. China
| | - Hui-Shuang Zhang
- c Department of Chemical Engineering , Huaihai Institute of Technology , Lianyungang, Jiangsu 222005, P.R. China
| | - Shao-Shuai Guo
- a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P.R. China
| | - Rui-Ting Dong
- a Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P.R. China
| |
Collapse
|
329
|
Torvinen M, Kalenius E, Sansone F, Casnati A, Jänis J. Noncovalent complexation of glucosylthioureidocalix[4]arenes with carboxylates and their gas-phase characteristics: an ESI-FTICR mass spectrometric study. JOURNAL OF MASS SPECTROMETRY : JMS 2011; 46:787-793. [PMID: 21834017 DOI: 10.1002/jms.1947] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The noncovalent complexation of three glucosylcalix[4]arenes (1-3) towards 23 mono- and dicarboxylic acid anions were studied by ESI-FTICR mass spectrometry. Competitive complexation, collision-induced dissociation and gas-phase H/D-exchange experiments were performed to obtain information on selectivity of calixarenes towards carboxylates and characteristics of their complexes. The flexibility and number of glucose units of the host and the spatial disposition of the hydrogen bonding groups on the carboxylate guests were found to affect the selectivity of complexation strongly. The glucosylcalixarenes exhibited particular selectivity for dicarboxylic acid anions incorporating π-systems, and clear isomeric selectivity was observed for isophthalic among phthalic acid anions and for fumaric acid over maleic acid anion.
Collapse
Affiliation(s)
- Mika Torvinen
- Department of Chemistry, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland
| | | | | | | | | |
Collapse
|
330
|
Fischer C, Lin G, Seichter W, Weber E. Bridge-disubstituted calix[4]arenes obtained via a new preparative route. Synthesis and structural study. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.087] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
331
|
Carroll WR, Zhao C, Smith MD, Pellechia PJ, Shimizu KD. A Molecular Balance for Measuring Aliphatic CH−π Interactions. Org Lett 2011; 13:4320-3. [DOI: 10.1021/ol201657p] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- William R. Carroll
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Chen Zhao
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Perry J. Pellechia
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Ken D. Shimizu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| |
Collapse
|
332
|
Cardellicchio C, Capozzi MAM, Centrone C, Naso F. Highly Enantioselective Oxidation of Aryl Benzyl Sulfides. PHOSPHORUS SULFUR 2011. [DOI: 10.1080/10426507.2010.529856] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | | | | | - Francesco Naso
- c Dipartimento di Chimica , Università di Bari , Bari, Italy
| |
Collapse
|
333
|
López C, Moya C, Basu PK, González A, Solans X, Font-Bardía M, Calvet T, Lalinde E, Teresa Moreno M. Synthesis, crystal structures and properties of cis- and trans-isomers of [Pt{C6H4-4R1-1-[C8H4N-3′-NOMe]}Cl2(dmso)] (R1=H or Cl). J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.05.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
334
|
Pérez Y, Mann E, Herradón B. Preparation and characterization of gold nanoparticles capped by peptide–biphenyl hybrids. J Colloid Interface Sci 2011; 359:443-53. [DOI: 10.1016/j.jcis.2011.04.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 03/30/2011] [Accepted: 04/09/2011] [Indexed: 01/15/2023]
|
335
|
Ozawa T, Okazaki K, Kitaura K. Importance of CH/π hydrogen bonds in recognition of the core motif in proline-recognition domains: an ab initio fragment molecular orbital study. J Comput Chem 2011; 32:2774-82. [PMID: 21710635 DOI: 10.1002/jcc.21857] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 05/11/2011] [Accepted: 05/13/2011] [Indexed: 11/07/2022]
Abstract
We examined CH/π hydrogen bonds in protein/ligand complexes involving at least one proline residue using the ab initio fragment molecular orbital (FMO) method and the program CHPI. FMO calculations were carried out at the Hartree-Fock (HF)/6-31G*, HF/6-31G**, second-order Møller-Plesset perturbation (MP2)/6-31G*, and MP2/6-31G** levels for three Src homology 3 (SH3) domains and five proline-recognition domains (PRDs) complexed with their corresponding ligand peptides. PRDs use a conserved set of aromatic residues to recognize proline-rich sequences of specific ligands. Many CH/π hydrogen bonds were identified in these complexes. CH/π hydrogen bonds occurred, in particular, in the central part of the proline-rich motifs. Our results suggest that CH/π hydrogen bonds are important in the recognition of SH3 and PRDs by their ligand peptides and play a vital role in the signal transduction system. Combined use of the FMO method and CHPI analysis is a valuable tool for the study of protein/protein and protein/ligand interactions and may be useful in rational drug design.
Collapse
Affiliation(s)
- Tomonaga Ozawa
- Central Research Laboratory, Kissei Pharmaceutical Company Ltd, Azumino-city, Nagano, 399-8304, Japan.
| | | | | |
Collapse
|
336
|
Costabile C, Mariconda A, Cavallo L, Longo P, Bertolasi V, Ragone F, Grisi F. The Pivotal Role of Symmetry in the Ruthenium-Catalyzed Ring-Closing Metathesis of Olefins. Chemistry 2011; 17:8618-29. [DOI: 10.1002/chem.201100483] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2011] [Revised: 03/18/2011] [Indexed: 11/09/2022]
|
337
|
Achard T, Benet-Buchholz J, Escudero-Adán EC, Riera A, Verdaguer X. N-Benzyl-N-phosphino-tert-butylsulfinamide and Its Coordination Modes with Ir(I), Cu(I), Pd(II), and Pt(II): P,S or P,O? Organometallics 2011. [DOI: 10.1021/om200217j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
338
|
Kano K, Kondo M, Inoue H, Kitagishi H, Colasson B, Reinaud O. Calorimetric study on coordination of tridentate imidazolyl calix[6]arene ligands to zinc ion in organic solvents. Inorg Chem 2011; 50:6353-60. [PMID: 21648400 DOI: 10.1021/ic200809k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Complexation of three kinds of tris(imidazolyl)calix[6]arenes containing alternate p-substituents (Calix-tBu, R(1) = R(2) = tert-butyl; Calix-NH(2), R(1) = tert-butyl, R(2) = NH(2); Calix-NO(2), R(1) = tert-butyl, R(2) = NO(2)) with Zn(ClO(4))(2)(H(2)O)(6) in acetonitrile, methanol, and THF was investigated via isothermal titration calorimetry (ITC). For the coordination of these calixarene ligands to Zn(II) in acetonitrile, typical one-phase exothermic titration curves were obtained, indicating the formation of 1:1 ligand-Zn(II) complexes accompanied by large conformational changes of the ligands. In contrast, the complexation in methanol was endothermic and dominated by favorable entropy changes. The entropy gains were achieved by extensive desolvation from both Zn(II) and the ligands. ITC measurements suggest a 2:1 ligand-Zn(II) complex formation in THF in the presence of excess ligands (Calix-NH(2) and Calix-NO(2)). The 2:1 complexes were converted to 1:1 complexes upon further addition of Zn(ClO(4))(2)(H(2)O)(6). The results indicate the important role of a coordinating solvent (acetonitrile) for direct formation of the 1:1 complexes under the conditions of excess ligand. Complexation of a ditopic ligand (Calix-Tri) with three triazole moieties on the wider rim was also studied via ITC. The first coordination of the imidazole moieties to Zn(II) was an exothermic process. This was followed by the entropically favorable coordination of the triazole moieties to the divalent cation. We have also investigated exchange of the fourth ligand (H(2)O) of the Zn(II) complex of Calix-NH(2) with butylamine, heptylamine, acetonitrile, and acetamide in a noncompetitive solvent, THF. The ΔH(0) tended to decrease upon increasing the electron-pair-donating ability of the guest ligand, whereas it was also affected by an entropic term due to restricted rotation of the guest ligand inside the calixarene cavity.
Collapse
Affiliation(s)
- Koji Kano
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
| | | | | | | | | | | |
Collapse
|
339
|
Capozzi MAM, Centrone C, Fracchiolla G, Naso F, Cardellicchio C. A Study of Factors Affecting Enantioselectivity in the Oxidation of Aryl Benzyl Sulfides in the Presence of Chiral Titanium Catalysts. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100310] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
340
|
The square conformation of phenylglycine-incorporated ascidiacyclamide is stabilized by CH/π interactions between amino acid side chains. Bioorg Med Chem 2011; 19:3372-7. [DOI: 10.1016/j.bmc.2011.04.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 04/14/2011] [Accepted: 04/18/2011] [Indexed: 11/20/2022]
|
341
|
Reaction between benzyllithium and 2-ethylpyridine: chiral crystals of a 1-(2-pyridyl)ethyllithium complex versus formation of lithium 4-benzyl-2-ethyl-1,4-dihydropyridinide. MONATSHEFTE FUR CHEMIE 2011. [DOI: 10.1007/s00706-011-0519-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
342
|
Nishio M. The CH/π hydrogen bond in chemistry. Conformation, supramolecules, optical resolution and interactions involving carbohydrates. Phys Chem Chem Phys 2011; 13:13873-900. [PMID: 21611676 DOI: 10.1039/c1cp20404a] [Citation(s) in RCA: 624] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The CH/π hydrogen bond is an attractive molecular force occurring between a soft acid and a soft base. Contribution from the dispersion energy is important in typical cases where aliphatic or aromatic CH groups are involved. Coulombic energy is of minor importance as compared to the other weak hydrogen bonds. The hydrogen bond nature of this force, however, has been confirmed by AIM analyses. The dual characteristic of the CH/π hydrogen bond is the basis for ubiquitous existence of this force in various fields of chemistry. A salient feature is that the CH/π hydrogen bond works cooperatively. Another significant point is that it works in nonpolar as well as polar, protic solvents such as water. The interaction energy depends on the nature of the molecular fragments, CH as well as π-groups: the stronger the proton donating ability of the CH group, the larger the stabilizing effect. This Perspective focuses on the consequence of this molecular force in the conformation of organic compounds and supramolecular chemistry. Implication of the CH/π hydrogen bond extends to the specificity of molecular recognition or selectivity in organic reactions, polymer science, surface phenomena and interactions involving proteins. Many problems, unsettled to date, will become clearer in the light of the CH/π paradigm.
Collapse
Affiliation(s)
- Motohiro Nishio
- The CHPI Institute, 705-6-338 Minamioya, Machida-shi, Tokyo, 194-0031, Japan.
| |
Collapse
|
343
|
Scheiner S. Weak H-bonds. Comparisons of CH···O to NH···O in proteins and PH···N to direct P···N interactions. Phys Chem Chem Phys 2011; 13:13860-72. [PMID: 21573303 DOI: 10.1039/c1cp20427k] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Whereas CH···O H-bonds are usually weaker than interpeptide NH···O H-bonds, this is not necessarily the case within proteins. The nominally weaker CH···O are surprisingly strong, comparable to, and in some cases stronger than, the NH···O H-bonds in the context of the forces that hold together the adjacent strands in protein β-sheets. The peptide NH is greatly weakened as proton donor in certain conformations of the protein backbone, particularly extended structures, and forms correspondingly weaker H-bonds. The PH group is a weak proton donor, but will form PH···N H-bonds. However, there is a stronger interaction in which P can engage, in which the P atom, not the H, directly approaches the N electron donor to establish a direct P···N interaction. This approach is stabilized by the same sort of electron transfer from the N lone pair to the P-H σ* antibond that characterizes the PH···N H-bond.
Collapse
Affiliation(s)
- Steve Scheiner
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT 84322-0300, USA.
| |
Collapse
|
344
|
Rajakannu P, Shankar B, Yadav A, Shanmugam R, Gupta D, Hussain F, Chang CH, Sathiyendiran M, Lu KL. Adaptation toward Restricted Conformational Dynamics: From the Series of Neutral Molecular Rotors. Organometallics 2011. [DOI: 10.1021/om200269z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | - Anju Yadav
- Department of Chemistry, University of Delhi, Delhi 110 007, India
| | | | - Deepak Gupta
- Department of Chemistry, University of Delhi, Delhi 110 007, India
| | - Firasat Hussain
- Department of Chemistry, University of Delhi, Delhi 110 007, India
| | - Che-Hao Chang
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan, Republic of China
| | | | - Kuang-Lieh Lu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan, Republic of China
| |
Collapse
|
345
|
|
346
|
Kwon HJ, Kim HW, Rhee YM. On the Mechanism of Irreversible Carbon Dioxide Binding with a Frustrated Lewis Pair: Solvent‐Assisted Frustration and Transition‐State Entropic Encouragement. Chemistry 2011; 17:6501-7. [DOI: 10.1002/chem.201003483] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Indexed: 11/07/2022]
Affiliation(s)
- Hee Jae Kwon
- Institute of Theoretical and Computational Chemistry, Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 790‐784 (Korea), Fax: (+82) 54‐279‐3399
| | - Hyun Woo Kim
- Institute of Theoretical and Computational Chemistry, Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 790‐784 (Korea), Fax: (+82) 54‐279‐3399
| | - Young Min Rhee
- Institute of Theoretical and Computational Chemistry, Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 790‐784 (Korea), Fax: (+82) 54‐279‐3399
| |
Collapse
|
347
|
Ni T, Zhao Y, Shao M, Zhu S, Xing F, Li M. Anion Effects on the Formation of Silver(I) Complexes with the Flexible Ligand 4,4′-Bis(1,2,4-triazol-1-ylmethyl)biphenyl. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201000433] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
348
|
Sundararajan K, Ramanathan N, Kar BP, Viswanathan K. Hydrogen bonded complexes of acetylene and boric acid: A matrix isolation infrared and ab initio study. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.01.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
349
|
Liu CS, Wang C, Hu M, Fang SM. Cadmium(II) Complexes with Mixed cis-Epoxysuccinate and 2,2′-Bipyridyl-Like Ligands: Syntheses, Crystal Structures, and Luminescent Properties. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201000437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
350
|
Uncuţa C, Bartha E, Gherase D, Loas IA, Teodorescu F, Varga RA, Vanthuyne N, Roussel C, Berg U. Chiral bicyclo[3.3.1]-3,7-dioxanonane derivatives: Study of crystallization mode and conformational dynamics in solution. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2010.12.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|