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Carbaboranerhodium Complexes with Rh-Rh, Rh-Cu and Rh-Au Bonds; Crystal Structure of 5-C2B9H8Me2)(CO)3(η5-C2B9H9Me2)>

DOI: 10.1039/DT9910001355

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1355 - 1360 (1991)

Update date:2022-08-05

Topics:

Authors:

Pilotti, Massimino U.Pilotti, Massimino U.

Topaloglu, IsilTopaloglu, Isil

Stone, F. Gordon A.Stone, F. Gordon A.

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Article abstract of DOI:10.1039/DT9910001355

The compound 5-C2B9H9Me2)> has been prepared and used to synthesise the dimetal complexes 5-C2B9H9Me2)> (M = Cu or Au) and 5-C2B9H9Me2)>.Protonation of 5-C2B9H9Me2)> gives an unstable hydride 5-C2B9H9Me2)>.In contrast, treatment of 5-C2B9H9Me2)> with HBF4*Et2O affords a dirhodium complex 5-C2B9H9Me2)2> in which one carbaborane fragment bridges the Rh-Rh bond via an exopolyhedral B-H->Rh bond.This species can be deprotonated to give an anionic complex 5-C2B9H8Me2)(CO)3(η5-C2B9H9Me2)>-, the + salt which may be obtained directly from 5-C2B9H9Me2)> by treatment of the latter with Cl.An X-ray crystallographic study established the structure of the anion.One rhodium centre is ligated by a CO molecule and by a C2B9H9Me2 cage in the normal η5 bonding mode, the other carries two CO groups and an η5-C2B9 cage.However, a boron atom β to the carbons in the pentagonal open CCBBB face of this cage forms a ? bond to the other rhodium atom , so that this C2B9H8Me2 group bridges the Rh-Rh bond <2.876(3) Angstroem>.The NMR data for the new compounds are reported and discussed.

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Product name:{N(C2H5)4}{Rh(CO)(P(C6H5)3)(η5-C2B9H9(CH3)2)}

Cas No:135157-57-2

135157-57-2

R&D Labs maybe for 135157-57-2

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