A (diborole)cobalt complex with a C-H···B Bridge, CpCo(1,3-C3B2Me5H), and its thallium derivative: synthesis, structure, and bonding
The reaction of CpCo(1,3-C3B2Me5H) (1) with CpTl affords the thallium derivative CpCo(1,3-C3B2Me5)Tl (2). The structures of 1 and 2 were determined by X-ray diffraction at 100 K. An “extra” hydrogen atom in 1 occupies a C-H···B bridging position. According to DFT calculations, 1 exists as a mixture...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
01 August 2012
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| In: |
European journal of inorganic chemistry
Year: 2012, Issue: 26, Pages: 4174-4182 |
| ISSN: | 1099-0682 |
| DOI: | 10.1002/ejic.201200215 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1002/ejic.201200215 Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/ejic.201200215 
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| Author Notes: | Dmitry V. Muratov, Alexander S. Romanov, Pavel V. Petrovskii, Mikhail Yu Antipin, Walter Siebert, and Alexander R. Kudinov |
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| 245 | 1 | 2 | |a A (diborole)cobalt complex with a C-H···B Bridge, CpCo(1,3-C3B2Me5H), and its thallium derivative |b synthesis, structure, and bonding |c Dmitry V. Muratov, Alexander S. Romanov, Pavel V. Petrovskii, Mikhail Yu Antipin, Walter Siebert, and Alexander R. Kudinov |
| 246 | 3 | 3 | |a A (diborole)cobalt complex with a C-H···B Bridge, CpCo(1,3-C 3 B 2 Me 5 H), and its thallium derivative |
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| 520 | |a The reaction of CpCo(1,3-C3B2Me5H) (1) with CpTl affords the thallium derivative CpCo(1,3-C3B2Me5)Tl (2). The structures of 1 and 2 were determined by X-ray diffraction at 100 K. An “extra” hydrogen atom in 1 occupies a C-H···B bridging position. According to DFT calculations, 1 exists as a mixture of two enantiomers with an enantiomerization barrier of only 0.5 kcal mol-1. The transition state has Cs symmetry with an endo-CH hydrogen atom. The isomeric iso-1with the Co-H···B bridge is less stable than 1 by 10 kcal mol-1.The formation of 1 and iso-1 from C3B2Me5H and CpCo(C2H4)2 have almost equal activation energies. The isomerization of iso-1 to 1 was shown to proceed as a two-step hydrogen transfer. The bonding of the “extra” hydrogen atom in the related CHB-bridged carborane nido-2,3,5-C3B3R5H2 and metallacarboranes M(C5R5)(C3B2R′5H) (R, R′ = H, Me; M = Co, Rh, Ir) as well as their hydridic isomers MH(C5R5)(C3B2R′5) was compared. According to energy decomposition analysis, the bonding of the parent anion [CpCo(1,3-C3B2H5)]- with metal cations becomes stronger in the following order: K+ < Na+ < Tl+ < Li+ < [RuCp]+. The attractive interactions between the [CpCo(1,3-C3B2H5)]- and Tl+ fragments are 68 % electrostatic and 32 % covalent. | ||
| 650 | 4 | |a Boron heterocycles | |
| 650 | 4 | |a Cobalt | |
| 650 | 4 | |a Sandwich complexes | |
| 650 | 4 | |a Thallium | |
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