210534-89-7Relevant academic research and scientific papers
Rhenium complexes with weakly coordinating solvent ligands, cis-[Re(PR3)(CO)4-(L)][BArF], L = CH2Cl2, Et2O, NC5F5: Decomposition to chloride-bridged dimers in CH2Cl2 solution
Huhmann-Vincent, Jean,Scott, Brian L.,Kubas, Gregory J.
, p. 115 - 124 (2008/10/08)
The solvent-coordinated complexes [cis-Re(CO)4(PR3)(S)][BArF] (R = Ph, iPr, Cy, BArF = [B(3,5-(CF3)2C6H3)4] -) for S = Et2O, CH2Cl2, and NC5F5 have been prepared from reaction of the neutral methyl precursors, cis-Re-(CO)4(PR3)(Me), with either [H(OEt2)2][BArF] or [Ph3C][BArF] in the appropriate solvent. A crystal structure of the complex [cis-Re(CO)4(PiPr3)(ClCH 2Cl)][BArF] shows that the dichloromethane ligand is coordinated through one chlorine, with an Re-Cl distance of 2.554(2) ?. The first example of a structurally characterized pentafluoropyridine complex of rhenium was also determined, [cis-Re(CO)4(PiPr3)(NC5F 5)][BArF], with an Re-N distance of 2.319(5) ?. Activation of C-Cl bonds in the dichloromethane complexes result in the formation of the chloride-bridged dimers, {[cis-Re(CO)4(PR3)]2(μ-Cl)}{BAr F}, and the X-ray structures of the Ph and Cy derivatives were determined.
