The synthesis and characterization of organoimido- Re(V) complexes. The x-ray crystal structures of [ReCl(NC6H4Me-4) (OMe)(tBuNC)2(PPh3)][BPh4] and [ReCl2(NC6H4Me-4)(PPh3)4-ClC6H4(O)CNNCHPh-O,N]

Synthesis and Crystal Structures of the Novel Tetrameric Nitrido Complexes [{cyclo-ReN}4(S2CNEt2)6(MeOH)2(PPh3)2][BPh4]2 · CH2Cl2 · 2 H2O and [{cyclo-ReN}4(S2CNEt2)4Cl4(PMe2Ph)4] · 2 acetone

“…The sides of the square are close to being linear with Re(1)±N(10)±Re (2) [16]) and is attributed to coordinated methanol, which is also consistent with the diamagnetism of the complex. The Re±P bond distances were found to be typical of those found in other rhenium tertiary phosphine complexes [3].…”

Theoretical studies of transition metal complexes with nitriles and isocyanides

“…The results of X-ray diffraction studies are in agreement with the data from theoretical calculations of MOs by the Fenske ± Hall method. In particular, the substantial occupancies of the p*-MOs of the isocyanide ligand in the [Mn(CNMe) n (CO) 57n Br] (n = 0 ± 4), [Mn(CNMe) n (CO) 67n ] + (n = 0 ± 6), [Mn(CN)(CO) 5 ], [Mn(CN) 6 ] 57 45 the presence of such a strong p-acceptor as the CO ligand. A comparison of the occupancies of the p*-MOs of the isocyanide and carbonyl ligands shows that the latter is the stronger p-acceptor than isocyanide and that p-back donation of the electron density from the d-orbitals of metal to the p*-MOs of the carbonyl ligand is more pronounced than that to the p*-orbitals of the isocyanide ligand.…”

Phenylimido complexes of rhenium: fluorine substituents provide protection, reactivity, and solubility

“…The formation of 1 : 1 complexes with common isocyanides has also been observed for reactions of [Tc(NPh)Cl 3 (PPh 3 ) 2 ], 20 and for reactions of robust isocyanides with the corresponding phenyl-or tolyl-or xylylimido complexes. 46,[53][54][55] These findings are not necessarily trivial since the ligand exchange behaviour of isocyanides has been found to be strongly dependent on steric and electronic factors. In particular, electronic effects due to electron withdrawing or electron donating substituents on ( phenyl) isocyanides have been underestimated in the coordination chemistry of these compounds.…”