98815-02-2Relevant academic research and scientific papers
Polyhedral Rhenaborane Chemistry: Crystal and Molecular Structures of the nido-6-Rhenadecaborane Cluster Compounds and ; Nuclear Magnetic Resonance Parameters of These and Other Related nido-Rhenadecab...
Beckett, Michael A.,Greenwood, Norman N.,Kennedy, John D.,Thornton-Pett, Mark
, p. 1119 - 1130 (2007/10/02)
The compounds (1) and (2) are formed in 40 and 25 percent yields respectively from the reaction of mer- with an excess of in refluxing ethanol.Also obtained in smaller yields are an isomer of compound (2), (3; ca. 4 percent), and a cluster-phosphine-substituted compound, (4; (5) can be obtained essentially quantitatively from compound (1) by heating in sym-C2D2Cl4 at ca. +100 deg C; it is an isomer of compound (4).All the compounds are air-stable coloured crystalline solids and their formulation as nido-B10H14-like cluster compounds is consistent with their n.m.r. properties.The (PMe2Ph)3H groupings in compounds (1), (2), (3), and (5) exhibit a dual pseudo-rotational fluxionality with ΔG values of 45-60 and of ca. 30 kJ mol-1 respectively for the two sub-processes.The rhenium atoms in these cluster compounds can be considered to contribute three orbitals to the cluster bonding, and these plus the four ligands associated with the metal centres are in 'capped octahedral' type of configurations about the d4 metal centres.
