645388-18-7Relevant academic research and scientific papers
Reactions of [Rh(Tp*)(PPh3)2] (Tp=hydrotris(3,5-dimethylpyrazolyl)-borate) involving fragmentation or loss of Tp*. Structures of [Rh(Cl)2(H)(PPh3) 2(pz*)]
C?rcu, Viorel,Fernandes, Manuel A.,Carlton, Laurence
, p. 3293 - 3298 (2003)
The complex [Rh(Tp*)(PPh3)2] reacts with dichloromethane to give [Rh(Cl)(H)2(PPh3) 2(pz*)] (1) and [Rh(Cl)2(H)(PPh3) 2(pz*)] (2), with C6F5SH to give [(PPh3)2Rh(μ-SC6F5) 2Rh(SC6F5)(H)(PPh3)(pz*)] (3) and with HgCl2 to give [{Rh(Cl)2(PPh3) 2}2Hg] (4), all under mild conditions. The crystal structures show that 2 has a slightly distorted octahedral geometry, 3 has approximately square planar Rh(I) and octahedral Rh(III) geometries, with an angle of 160.7° between the two RhS2 planes and 4 has rhodium with a square pyramidal geometry where mercury occupies a position at the apex of the pyramid; the Rh-Hg-Rh geometry is linear and, with respect to the Rh-Hg-Rh axis, the ligands (Cl, PPh3) on one rhodium are offset by approximately 42° relative to their counterparts on the second rhodium. In 2 an intramolecular hydrogen bond exists between the pyrazole NH and one of the chloride ligands. Structure 4 is unusual in that it contains an unsupported mercury bridge.
