| Autor: |
Sonja Henkel, Matthias Westerhausen, Johann Weidlein, Wolfgang Schwarz, Bernd Rademacher |
| Rok vydání: |
1994 |
| Předmět: |
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| Zdroj: |
Journal of Organometallic Chemistry. 469:135-149 |
| ISSN: |
0022-328X |
| DOI: |
10.1016/0022-328x(94)88066-2 |
| Popis: |
The equimolar reaction of lithium tris(trimethylsilyl)methanide with zinc(II) chloride in a solvent mixture of THF and diethylether yields Lithium-trichloro-bis[tris(trimethylsilyl)methyl] zincate·2THF·Et2O. The addition of organyl lithium leads to the formation of heteroleptic organyl-[tris(trimethylsilyl)methyl]zinc. No ligand exchange reactions can be observed for these compounds. Due to the steric demand of the tris(trimethylsilyl)methyl substituent these derivatives are monomeric in solution as well as in the solid state. Bis(trimethylsilyl)methyl-[tris(trimethylsilyl) methyl]zinc crystallizes in the monoclinic space group P21/n (a = 910.7(2), b = 1633.0(4) c = 1863.9(4) pm, β = 94.18(2)° and Z = 4). The ZnC-distances are elongated to a value of 197 pm due to the steric demand of both the substituents. The zinc atom is with an CZnC angle of 176° nearly linear coordinated. Phenyl-[tris(trimethylsilyl)methyl]zinc with a melting point of about 24°C crystallizes upon cooling in a nitrogen stream (P21, a = 908.4(3), b = 1489.0(4), c = 1594.5(3) pm, β = 94.68(2)° and Z = 4). Due to the small size of the phenyl group rather short ZnC-bond lengths of about 193.5 pm are formed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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