151
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Li X. Ab initio study of MKr n 2+ (M = Cu, Ag, and Au, n = 1-6) clusters. J Mol Model 2011; 18:1003-8. [DOI: 10.1007/s00894-011-1138-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 05/24/2011] [Indexed: 10/18/2022]
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152
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Lv Z, Chen GH, Li D, Wu D, Huang XC, Li ZR, Liu WG. RgBF2+ complexes (Rg = Ar, Kr, and Xe): The cations with large stabilities. J Chem Phys 2011; 134:154302. [DOI: 10.1063/1.3572224] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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153
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Bacchus-Montabonel MC. Radiative and collisional processes in space chemistry. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2011. [DOI: 10.1007/s12210-011-0115-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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154
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Ross AJ, Dreiocker F, Schäfer M, Oomens J, Meijer AJHM, Pickup BT, Jackson RFW. Evidence for the Role of Tetramethylethylenediamine in Aqueous Negishi Cross-Coupling: Synthesis of Nonproteinogenic Phenylalanine Derivatives on Water. J Org Chem 2011; 76:1727-34. [DOI: 10.1021/jo102334c] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Andrew J. Ross
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield, S3 7HF, U.K
| | - Frank Dreiocker
- Department of Chemistry, University of Cologne, Greinstrasse 4, 50939 Köln, Germany
| | - Mathias Schäfer
- Department of Chemistry, University of Cologne, Greinstrasse 4, 50939 Köln, Germany
| | - Jos Oomens
- FOM Institute for Plasma Physics Rijnhuizen, Edisonbaan 14, Nieuwegein 3439 MN, The Netherlands
- University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
| | - Anthony J. H. M. Meijer
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield, S3 7HF, U.K
| | - Barry T. Pickup
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield, S3 7HF, U.K
| | - Richard F. W. Jackson
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield, S3 7HF, U.K
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155
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Best J, Sazanovich IV, Adams H, Bennett RD, Davies ES, Meijer AJHM, Towrie M, Tikhomirov SA, Bouganov OV, Ward MD, Weinstein JA. Structure and ultrafast dynamics of the charge-transfer excited state and redox activity of the ground state of mono- and binuclear platinum(II) diimine catecholate and bis-catecholate complexes: a transient absorption, TRIR, DFT, and electrochemical study. Inorg Chem 2011; 49:10041-56. [PMID: 20873855 DOI: 10.1021/ic101344t] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A series of mononuclear complexes of the type [Pt(Bu(2)cat)(4,4'-R(2)-bipy)] [where Bu(2)cat is the dianion of 3,5-(t)Bu(2)-catechol and R = H, (t)Bu, or C(O)NEt(2)] and analogous dinuclear complexes based on the "back-to-back" bis-catechol ligand 3,3',4,4'-tetrahydroxybiphenyl have been studied in detail in both their ground and excited states by a range of physical methods including electrochemistry, UV/vis/near-IR, IR, and electron paramagnetic resonance spectroelectrochemistry, and time-resolved IR (TRIR) and transient absorption (TA) spectroscopy. Density functional theory calculations have been performed to support these studies, which provide a detailed picture of the ground- and excited-state electronic structures, and excited-state dynamics, of these complexes. Notable observations include the following: (i) for the first time, the lowest-energy catecholate → bipyridine (bpy) ligand-to-ligand charge-transfer (LL'CT) excited states of these chromophores have been studied by TRIR spectroscopy, showing a range of transient bands associated with the bpy radical anion and semiquinone species, and back-electron-transfer occurring in hundreds of picoseconds; (ii) strong electronic coupling between the two catecholate units in the bridging ligand of the dinuclear complexes results in a delocalized, planar (class 3) "mixed-valence" catecholate(2-)/semiquinone(•-) state formed by one-electron oxidation of the bridging ligand; (iii) in the LL'CT excited state of the dinuclear complexes, the bridging ligand is symmetrical and delocalized, whereas the bpy radical anion is localized at one terminus of the complex. This study is the first example of an investigation of excited-state behavior in platinum(II) catecholate complexes, performed with the use of picosecond TRIR and femtosecond TA spectroscopy.
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Affiliation(s)
- Jonathan Best
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK
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156
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157
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Ghedini M, Golemme A, Aiello I, Godbert N, Termine R, Crispini A, La Deda M, Lelj F, Amati M, Belviso S. Liaisons between photoconductivity and molecular frame in organometallic Pd(ii) and Pt(ii) complexes. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11926e] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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158
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Tang GD, Zhao JY, Li RQ, Zhang ZC. Synthesis, characteristic and theoretical investigation of the structure, electronic properties and second-order nonlinearity of salicylaldehyde Schiff base and their derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:449-457. [PMID: 21159548 DOI: 10.1016/j.saa.2010.11.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Revised: 10/06/2010] [Accepted: 11/15/2010] [Indexed: 05/30/2023]
Abstract
A series of asymmetric donor-acceptor substituted salen-type Schiff-bases have been synthesized and their structures, electronic properties and second order nonlinearities were investigated by DFT methods. In order to verify the stable of these Schiff-base derivates, the IR spectrum of these Schiff-base derivates were calculated, the result showed that these compounds are stable. The results of TD-DFT calculation indicate that the derivatives with the electron-donating group (CH3, OCH3 or N(C2H5)2) have a red shift absorption compared to derivatives with the electron-withdrawing group (NO2). The analysis of MOS indicates that the CN group has contribution to the LUMO orbital while the groups of OCH3, N(C2H5)2 and NO2 have contribution to the HOMO orbital. OCH3, N(C2H5)2 as electron rich groups, made the derivates have a larger first static hyperpolarizability. However, the compound (II) with a NO2 substituent, also has a large first static hyperpolarizability. This is probably because of the special transition model, namely the values of two oscillator strength f (fHOMO-1-LUMO=0.405, fHOMO-LUMO=0.321) are almost equal. In order to understand the influence of the energy gap (ΔE) between the HOMO and the LUMO orbitals on the first static hyperpolarizability, we calculated the energy gap (ΔE) of all Schiff-base compounds. The results show that the smaller the HOMO-LUMO energy gap is, the larger the first static hyperpolarizability is.
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Affiliation(s)
- Guo-Dong Tang
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223001, Jiangsu Province, PR China.
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159
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Xinying L, Xue C. Interaction and Electron Density Properties of MKr42+ (M=Cu, Ag and Au): ab initio Calculation. Aust J Chem 2011. [DOI: 10.1071/ch10373] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Quantum chemical calculations of the structures and stabilities of the MKr42+ series at the CCSD(T) theoretical level have been performed. The role of the interaction was investigated using the natural bond orbital (NBO), Laplacian, electron density deformation, electron localization function and reduced density gradient analysis. The results show that a covalent contribution occurs in the Kr-M2+ bonding.
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160
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La Deda M, Crispini A, Aiello I, Ghedini M, Amati M, Belviso S, Lelj F. Cyclometalated Pt(iv) trans-diiodo adducts: experimental and computational studies within an homologous series of compounds. Dalton Trans 2011; 40:5259-70. [DOI: 10.1039/c1dt10160a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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161
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Shimazaki Y, Arai N, Dunn TJ, Yajima T, Tani F, Ramogida CF, Storr T. Influence of the chelate effect on the electronic structure of one-electron oxidized group 10 metal(ii)-(disalicylidene)diamine complexes. Dalton Trans 2011; 40:2469-79. [DOI: 10.1039/c0dt01574a] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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162
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Massah AR, Dreiocker F, Jackson RFW, Pickup BT, Oomens J, Meijer AJHM, Schäfer M. Gas-phase study of new organozinc reagents by IRMPD-spectroscopy, computational modelling and tandem-MS. Phys Chem Chem Phys 2011; 13:13255-67. [DOI: 10.1039/c1cp20747d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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163
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BULANIN MO. Collision-induced shift of the ionization continuum and interaction polarizabilities of rare-gas atoms. Mol Phys 2010. [DOI: 10.1080/002689797169862] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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164
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BURDA JV, ZAHRADNÍK R, HOBZA P. Dimers of rare gas atoms: CCSD(T), CCSDT and FCI calculations on the (He)2 dimer, CCSD(T) and CCSDT calculations on the (Ne)2 dimer, and CCSD(T) all-electron and pseudopotential calculations on the dimers from (Ne)2 through (Xe)2. Mol Phys 2010. [DOI: 10.1080/002689796173804] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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165
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HEINEMANN CHRISTOPH, SCHWARZ HELMUT, KOCH WOLFRAM. Ground-state potentials for Co+/rare-gas interactions. Mol Phys 2010. [DOI: 10.1080/002689796173840] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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166
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Borocci S, Bronzolino N, Giordani M, Grandinetti F. Cationic noble gas hydrides: a theoretical investigation of dinuclear HNgFNgH+ (Ng = He-Xe). J Phys Chem A 2010; 114:7382-90. [PMID: 20560587 DOI: 10.1021/jp102018n] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Theoretical calculations at the B3LYP, MP2, and CCSD(T) levels of theory disclose the conceivable existence of cationic noble gas hydrides containing two Ng atoms. These species have a general formula of HNgFNgH(+) (Ng = He-Xe), and are the cationic counterparts of the neutral HNgF. The optimized geometries, harmonic frequencies, and bonding properties point to ion-dipole complexes between a fluoride anion and two covalent H-Ng(+) cations, best formulated as (H-Ng(+))(2)F(-). The HXeFXeH(+) is also isoelectronic with the recently experimentally observed HXeOXeH (Khriachtchev et al. J. Am. Chem. Soc. 2008, 130, 6114-6118). The resulting HNgFNgH(+) are thermochemically stable with respect to dissociation into HNg(+) + HNgF and HNg(+) + H + Ng + F, but are largely unstable with respect to both the loss of HF (with formation of HNg(+) + Ng) and H(2)F(+) (with formation of two Ng atoms). These decompositions pass through bent transition structures, and only the heaviest HArFArH(+), HKrFKrH(+), and HXeFXeH(+) are protected by energy barriers large enough (ca. 10-15 kcal mol(-1)) to support their conceivable metastability. In line with other series of noble gas compounds, the neon cation HNeFNeH(+) is the least stable among the various HNgFNgH(+).
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Affiliation(s)
- Stefano Borocci
- Dipartimento di Scienze Ambientali, Università della Tuscia, L.go dell' Università, s.n.c., 01100 Viterbo, Italy
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167
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Investigation of the interaction of gold(III)–alkyldiamine complexes with l-histidine and imidazole ligands by 1H and 13C NMR, and UV spectrophotometry. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.05.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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168
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Patkowski K, Szalewicz K. Argon pair potential at basis set and excitation limits. J Chem Phys 2010; 133:094304. [DOI: 10.1063/1.3478513] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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169
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Samet A, Ahmed AB, Mlayah A, Boughzala H, Hlil E, Abid Y. Optical properties and ab initio study on the hybrid organic–inorganic material [(CH3)2NH2]3[BiI6]. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.05.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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170
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Waywell P, Gonzalez V, Gill MR, Adams H, Meijer AJHM, Williamson MP, Thomas JA. Structure of the complex of [Ru(tpm)(dppz)py](2+) with a B-DNA oligonucleotide - a single-substituent binding switch for a metallo-intercalator. Chemistry 2010; 16:2407-17. [PMID: 20108276 DOI: 10.1002/chem.200901758] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
We report the synthesis of three new complexes related to the achiral [Ru(tpm)(dppz)py](2+) cation (tpm=tripyridazole methane, dppz=dipyrido[3,2-a:2',3'-c]phenazine, py=pyridine) that contain an additional single functional group on the monodentate ancillary pyridyl ligand. Computational calculations indicate that the coordinated pyridyl rings are in a fixed orientation parallel to the dppz axis, and that the electrostatic properties of the complexes are very similar. DNA binding studies on the new complexes reveal that the nature and positioning of the functional group has a profound effect on the binding mode and affinity of these complexes. To explore the molecular and structural basis of these effects, circular dichroism and NMR studies on [Ru(tpm)(dppz)py]Cl(2) with the octanucleotides d(AGAGCTCT)(2) and d(CGAGCTCG)(2), were carried out. These studies demonstrate that the dppz ligand intercalates into the G(2)-A(3) step, with {Ru(tpm)py} in the minor groove. They also reveal that the complex intercalates into the binding site in two possible orientations with the pyridyl ligand of the major conformer making close contact with terminal base pairs. We conclude that substitution at the 2- or 3-position of the pyridine ring has little effect on binding, but that substitution at the 4-position drastically disrupts intercalative binding, particularly with a 4-amino substituent, because of steric and electronic interactions with the DNA. These results indicate that complexes derived from these systems have the potential to function as sequence-specific light-switch systems.
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Affiliation(s)
- Philip Waywell
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK
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171
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Frischmann PD, Facey GA, Ghi PY, Gallant AJ, Bryce DL, Lelj F, MacLachlan MJ. Capsule Formation, Carboxylate Exchange, and DFT Exploration of Cadmium Cluster Metallocavitands: Highly Dynamic Supramolecules. J Am Chem Soc 2010; 132:3893-908. [DOI: 10.1021/ja910419h] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter D. Frischmann
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada, Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, D’Iorio Hall, 10 Marie Curie Pvt., Ottawa, Ontario K1N 6N5, Canada, and La.M.I. and LaSSCAM INSTM Sezione Basilicata, Dipartimento di Chimica, Università della Basilicata, via N. Sauro 85, 85100 Potenza, Italy
| | - Glenn A. Facey
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada, Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, D’Iorio Hall, 10 Marie Curie Pvt., Ottawa, Ontario K1N 6N5, Canada, and La.M.I. and LaSSCAM INSTM Sezione Basilicata, Dipartimento di Chimica, Università della Basilicata, via N. Sauro 85, 85100 Potenza, Italy
| | - Phuong Y. Ghi
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada, Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, D’Iorio Hall, 10 Marie Curie Pvt., Ottawa, Ontario K1N 6N5, Canada, and La.M.I. and LaSSCAM INSTM Sezione Basilicata, Dipartimento di Chimica, Università della Basilicata, via N. Sauro 85, 85100 Potenza, Italy
| | - Amanda J. Gallant
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada, Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, D’Iorio Hall, 10 Marie Curie Pvt., Ottawa, Ontario K1N 6N5, Canada, and La.M.I. and LaSSCAM INSTM Sezione Basilicata, Dipartimento di Chimica, Università della Basilicata, via N. Sauro 85, 85100 Potenza, Italy
| | - David L. Bryce
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada, Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, D’Iorio Hall, 10 Marie Curie Pvt., Ottawa, Ontario K1N 6N5, Canada, and La.M.I. and LaSSCAM INSTM Sezione Basilicata, Dipartimento di Chimica, Università della Basilicata, via N. Sauro 85, 85100 Potenza, Italy
| | - Francesco Lelj
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada, Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, D’Iorio Hall, 10 Marie Curie Pvt., Ottawa, Ontario K1N 6N5, Canada, and La.M.I. and LaSSCAM INSTM Sezione Basilicata, Dipartimento di Chimica, Università della Basilicata, via N. Sauro 85, 85100 Potenza, Italy
| | - Mark J. MacLachlan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada, Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, D’Iorio Hall, 10 Marie Curie Pvt., Ottawa, Ontario K1N 6N5, Canada, and La.M.I. and LaSSCAM INSTM Sezione Basilicata, Dipartimento di Chimica, Università della Basilicata, via N. Sauro 85, 85100 Potenza, Italy
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172
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Foxon SP, Alamiry MAH, Walker MG, Meijer AJHM, Sazanovich IV, Weinstein JA, Thomas JA. Photophysical properties and singlet oxygen production by ruthenium(II) complexes of benzo[i]dipyrido[3,2-a:2',3'-c]phenazine: spectroscopic and TD-DFT study. J Phys Chem A 2010; 113:12754-62. [PMID: 19791785 DOI: 10.1021/jp906716g] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The photophysical properties of a series of Ru(II) complexes containing benzo[i]dipyrido[3,2-a:2',3'-c]phenazine (dppn) as a ligand are reported. Transient absorption spectroscopy studies indicate that, in contrast to related Ru(dppz) complexes (dppz = dipyrido[3,2-a:2',3'-c]phenazine), the excited state of all the dppn systems is a long-lived pipi* triplet state. Computational studies (DFT and TD-DFT) confirm that the excited state is based on the dppn ligand. Near-infrared luminescence studies reveal that the complexes are efficient singlet oxygen sensitizers with yields of 70-83%.
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Affiliation(s)
- Simon P Foxon
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
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173
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Dreiocker F, Oomens J, Meijer AJHM, Pickup BT, Jackson RFW, Schäfer M. Structure Elucidation of Dimethylformamide-Solvated Alkylzinc Cations in the Gas Phase. J Org Chem 2010; 75:1203-13. [DOI: 10.1021/jo902492z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Frank Dreiocker
- Department of Chemistry, Institute for Organic Chemistry, University of Cologne, Greinstrasse 4, 50939 Köln, Germany
| | - Jos Oomens
- FOM Institute for Plasma Physics Rijnhuizen, Edisonbaan 14, Nieuwegein 3439 MN, The Netherlands
- University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands
| | - Anthony J. H. M. Meijer
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield, S3 7HF, United Kingdom
| | - Barry T. Pickup
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield, S3 7HF, United Kingdom
| | - Richard F. W. Jackson
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield, S3 7HF, United Kingdom
| | - Mathias Schäfer
- Department of Chemistry, Institute for Organic Chemistry, University of Cologne, Greinstrasse 4, 50939 Köln, Germany
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174
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Wang C, Straka M, Pyykkö P. Formulations of the closed-shell interactions in endohedral systems. Phys Chem Chem Phys 2010; 12:6187-203. [DOI: 10.1039/b922808j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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175
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Xinying L, Senfeng W, Chengfang Z, Yongfang Z. Theoretical Investigation on Structures and Stabilities of CuXenZ (n = 1 - 3, Z = - 1, 0, +1) Clusters. Aust J Chem 2010. [DOI: 10.1071/ch09381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The structures and stabilities of CuXe
n
Z
(n = 1–3, Z = –1, 0, +1) cluster series at the CCSD(T) theoretical level have been investigated. Herein, it is shown that the cations are more stable and have more compact geometries than the anions and neutrals. The role of the interaction is explained using the natural bond orbital, population, and electron density analysis.
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176
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Relativistic Pseudopotentials. CHALLENGES AND ADVANCES IN COMPUTATIONAL CHEMISTRY AND PHYSICS 2010. [DOI: 10.1007/978-1-4020-9975-5_6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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177
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Łabuda M, González-Vázquez J, González L. A wavepacket study of the low-energy charge transfer process in the S3+ + H reaction using time-resolved electronic densities. Phys Chem Chem Phys 2010; 12:5439-45. [PMID: 20379580 DOI: 10.1039/b926825a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Marta Łabuda
- Institute for Physical Chemistry, Friedrich-Schiller University of Jena (FSU), Helmoltzweg, 4, DE-07743 Jena, Germany.
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178
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Grange CS, Meijer AJHM, Ward MD. Trinuclear ruthenium dioxolene complexes based on the bridging ligand hexahydroxytriphenylene: electrochemistry, spectroscopy, and near-infrared electrochromic behaviour associated with a reversible seven-membered redox chain. Dalton Trans 2010:200-11. [DOI: 10.1039/b918086a] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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179
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Amami M, Zaidi A, Lahmar S, Bacchus-Montabonel M. Theoretical treatment of state-selective one-electron capture by Mg2+ ions in collision with Zn. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2009.11.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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180
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Varga Z, Groen CP, Kolonits M, Hargittai M. Curious matrix effects: a computational, electron diffraction, and vibrational spectroscopic study of dysprosium triiodide. Dalton Trans 2010; 39:6221-30. [DOI: 10.1039/c001182g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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181
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Thakkar AJ, McCarthy SP. Toward improved density functionals for the correlation energy. J Chem Phys 2009; 131:134109. [PMID: 19814545 DOI: 10.1063/1.3243845] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Eleven density functionals, including some of the most widely used ones, are tested on their ability to predict nonrelativistic, electron correlation energies for the 17 atoms from He to Ar, the 17 cations from Li(+) to K(+), and 11 (1)S state atoms from Ca to Rn. They all lead to relatively poor predictions for the heavier atoms. Reparametrization of these functionals improves their performance for light atoms but does not alleviate their problems with the heavier, closed-shell atoms. Several novel, few-parameter, density functionals for the correlation energy are developed heuristically. Four new functionals lead to qualitatively improved predictions for the heavier atoms without unreasonably compromising accuracy for the lighter atoms. Further progress would be facilitated by reliable estimates of electron correlation energies for more atoms, particularly heavy ones.
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Affiliation(s)
- Ajit J Thakkar
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
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Amati M, Lelj F. Bis(cyclopentadienyl)dihydrido Mo and W complexes as Lewis bases — A computational study about their adducts with BX 3(X = F, Cl) and Al(CH 3) 3. CAN J CHEM 2009; 87:1406-1414. [DOI: 10.1139/v09-103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
A computational investigation about the Lewis acid–base adducts between bases Cp2MH2(M = Mo, W) and acids BX3(X = F, Cl) and Al(CH3)3is presented. Density functional methods based on pure and hybrid correlation-exchange functionals and relativistic corrections based on the zero order relativistic approximation (ZORA) have been applied. A comparison with experimental data has been addressed to give insights about the nature of the acid–base interaction with the aim to evaluate the role of the transition metal in charge donation toward the acid centre. In this respect, the likelihood of proposed criteria for recognizing the presence of transition-metal direct charge donation has been discussed.
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Affiliation(s)
- Mario Amati
- Univesità degli Studi della Basilicata, Dipartimento di Chimica, Via N. Sauro, 85, IT-85100 Potenza, Italy
| | - Francesco Lelj
- Univesità degli Studi della Basilicata, Dipartimento di Chimica, Via N. Sauro, 85, IT-85100 Potenza, Italy
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184
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Tang GD, Jiang ZJ, Li RQ, Zhang JF, Zhang Y, Zhang C. DFT studies on nonlinear optical properties of neutral nest-shaped heterothiometallic [MOS3Py5Cu3X] (M=Mo, W; X=F, Cl, Br, I) clusters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:228-232. [PMID: 19646920 DOI: 10.1016/j.saa.2009.06.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2008] [Revised: 05/12/2009] [Accepted: 06/07/2009] [Indexed: 05/28/2023]
Abstract
Theoretical calculations were carried out on some neutral nest-shaped heterothiometallic cluster compounds [MOS(3)Py(5)Cu(3)X] (M=Mo, W; X=F, Cl, Br, I) with the high first static hyperpolarizabilities beta values. The geometries of these cluster compounds were optimized by the restricted DFT method at B3LYP level with LanL2DZ base set without any constrains. In order to understand the relationship between the first static hyperpolarizabilities and the compositions of these clusters, the frontier orbital compositions and energy gaps between the HOMO and LUMO orbitals were calculated and analysed. In these clusters the HOMO orbitals are mainly composed of halogen atoms and the first static hyperpolarizability increases from F to I atom. The LUMO orbitals of clusters [MoOS(3)Py(5)Cu(3)X] are comprised of Mo, O and S atoms while the LUMO orbitals of clusters [WOS(3)Py(5)Cu(3)X] composed of W atom and pyridine ring. The energy gaps between the HOMO and LUMO orbitals of the clusters [MoOS(3)Py(5)Cu(3)X] are smaller than those of the clusters [WOS(3)Py(5)Cu(3)X]. As a result the first static hyperpolarizability values of the clusters [MoOS(3)Py(5)Cu(3)X] are higher than those of the clusters [WOS(3)Py(5)Cu(3)X].
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Affiliation(s)
- Guo-dong Tang
- Department of Chemistry, Jiangsu Province Key Laboratory for Chemistry of Low-dimensional Materials, Huaiyin Teachers College, Huai'an 223001, Jiangsu Province, PR China
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185
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Al-Maythalony BA, Wazeer MI, Isab AA. Synthesis and characterization of gold(III) complexes with alkyldiamine ligands. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.02.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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186
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Schneider H, Takahashi K, Skodje RT, Weber JM. Infrared spectra of SF6(-) x HCOOH x Ar(n) (n = 0-2): infrared triggered reaction and Ar-induced reactive inhibition. J Chem Phys 2009; 130:174302. [PMID: 19425771 DOI: 10.1063/1.3125960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present the infrared spectra of SF(6)(-) x HCOOH x Ar(m) (m=0-2) complexes. We find that the binding motif involves a single hydrogen bond between the SF(6)(-) anion and the OH group of the formic acid, with the CH group weakly tethered to a neighboring F atom. Similar to the case of hydrated SF(6)(-), the SF bond involved in the (OH-F) bond is significantly stretched and weakened by the attachment of the HCOOH ligand. The bare complex undergoes reaction upon infrared absorption in the CH/OH stretching region of the formic acid moiety, leading predominantly to the formation of SF(4)(-) + 2HF + CO(2). The reaction can be inhibited by attachment of two Ar atoms. We discuss a likely reaction mechanism in the framework of ab initio calculations, suggesting that reaction proceeds via tunneling through the potential barrier.
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Affiliation(s)
- Holger Schneider
- JILA, NIST, and Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309, USA
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189
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Biswas C, Drew MGB, Escudero D, Frontera A, Ghosh A. Anion-π, Lone-Pair-π, π-π and Hydrogen-Bonding Interactions in a CuIIComplex of 2-Picolinate and Protonated 4,4′-Bipyridine: Crystal Structure and Theoretical Studies. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900110] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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190
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Birkmann B, Ehlers A, Fröhlich R, Lammertsma K, Hahn F. Metallosupramolecular Complexes Derived from Bis(benzene-o-dithiol) Ligands. Chemistry 2009; 15:4301-11. [DOI: 10.1002/chem.200802560] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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191
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Xinying L, Xue C, Yongfang Z. Structure and stability of AuXe n Z (n = 1–3, Z = −1, 0, +1) clusters. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0562-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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192
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Groen CP, Varga Z, Kolonits M, Peterson KA, Hargittai M. Does the 4f Electron Configuration Affect Molecular Geometries? A Joint Computational, Vibrational Spectroscopic, and Electron Diffraction Study of Dysprosium Tribromide. Inorg Chem 2009; 48:4143-53. [DOI: 10.1021/ic802340g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Cornelis Petrus Groen
- Materials Structure and Modeling Research Group of the Hungarian Academy of Sciences, Budapest University of Technology and Economics, P.O. Box 91, 1521 Budapest, Hungary, and Department of Chemistry, Washington State University, Pullman, Washington 99164
| | - Zoltán Varga
- Materials Structure and Modeling Research Group of the Hungarian Academy of Sciences, Budapest University of Technology and Economics, P.O. Box 91, 1521 Budapest, Hungary, and Department of Chemistry, Washington State University, Pullman, Washington 99164
| | - Mária Kolonits
- Materials Structure and Modeling Research Group of the Hungarian Academy of Sciences, Budapest University of Technology and Economics, P.O. Box 91, 1521 Budapest, Hungary, and Department of Chemistry, Washington State University, Pullman, Washington 99164
| | - Kirk A. Peterson
- Materials Structure and Modeling Research Group of the Hungarian Academy of Sciences, Budapest University of Technology and Economics, P.O. Box 91, 1521 Budapest, Hungary, and Department of Chemistry, Washington State University, Pullman, Washington 99164
| | - Magdolna Hargittai
- Materials Structure and Modeling Research Group of the Hungarian Academy of Sciences, Budapest University of Technology and Economics, P.O. Box 91, 1521 Budapest, Hungary, and Department of Chemistry, Washington State University, Pullman, Washington 99164
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Excitation spectra of CdRg (Rg=He, Ne, Xe) complexes recorded at the D1Σ0+←X1Σ0+ transition: From the heaviest CdXe to the lightest CdHe. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.02.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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194
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Borocci S, Bronzolino N, Grandinetti F. Noble gas–selenium molecular species: A theoretical investigation of FNgSe− (Ng=He–Xe). Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.01.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhang P, Zhao Y, Song X, Zhang G, Wang Y. Theoretical Investigation of Square-Planar MXe42+ (M = Cu, Ag, Au) Cations. Aust J Chem 2009. [DOI: 10.1071/ch08467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The structures, stabilities, and bonding mechanism of the square-planar doubly charged MXe42+ (M = Cu, Ag, Au) cations have been investigated at the UB3LYP and UMP2 theoretical levels. At the best theoretical estimate, the M–Xe bond lengths are calculated to be 266.2, 273.6, and 273.8 pm, and the corresponding binding energies with respect to M2+ and four xenon atoms are 771.49, 820.57, and 908.47 kJ mol–1, respectively, along the series Cu – Ag – Au. Owing to an unusually high relativistic effect, gold evidently tends to be strongly bonded to the noble gas atoms in comparison with copper and silver. The electrostatic interactions play an important role in divalent noble-gas–noble-metal bonding. Apart from CuXe42+, the square-planar MXe42+ cations are stable enough to be prepared in experiments.
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Stereochemistry of the reaction products of the oxidative addition reaction of methyl iodide to [Rh((C4H3S)COCHCOR)(CO)(PPh3)]: A NMR and computational study. R=CF3, C6H5, C4H3S. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.04.046] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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198
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Theoretical and crystallographic study of edge-to-face aromatic interactions between pyridine moieties and benzene. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.12.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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199
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Gural'skiy IA, Escudero D, Frontera A, Solntsev PV, Rusanov EB, Chernega AN, Krautscheid H, Domasevitch KV. 1,2,4,5-Tetrazine: an unprecedented μ4-coordination that enhances ability for anion⋯π interactions. Dalton Trans 2009:2856-64. [DOI: 10.1039/b818125j] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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200
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Halo M, Casassa S, Maschio L, Pisani C. Periodic local-MP2 computational study of crystalline neon. Phys Chem Chem Phys 2009; 11:586-92. [DOI: 10.1039/b812870g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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