A crystallographic and spectroscopic investigation of the stereochemistry of [MBr(CO)3L2] (M=Mn, Re) complexes: crystal and molecular structures of [MBr(CO)3L2] {M=Mn, L=P(C6H4Cl-4)3, 1/2dppe, 1/2dppf; M=Re, L=P(C6H4OMe-4)3, 1/2dppf}

Rhenium carbonyl compounds with (diphenyl)phosphinoalkynes and a sterically hindered phosphinoalkyne

“…The structure of fac-{Re(CO) 3 } fragment in the three complexes (2, 6, 8) does not differ significantly and it is also similar to previously reported rhenium carbonyl complexes [21,32,33]. The C"C bond distance is also similar for the three complexes and resembles reported values for other P-coordinated phosphinoalkyne metal complexes [3,4,7,11,12].…”

“…Another option is the presence of a sole bidentate bis(diphenylphosphine) ligand occupying the two cis-positions [33]. The geometric parameters around rhenium metal for complex 6 are very similar to those of previously reported complexes with the coordination set fac-[ReBr(CO) 3 P 2 ] [21, 32,33]. When comparing these parameters between complexes 6 and 8, we can see that the substitution of the phenyl groups by the o-tolyl groups implies that Re-P bonds are somewhat lengthier and some angle bonds that contain phosphorus are slightly more opened, changes that should be attributed to higher steric hindrance of o-tolyl groups.…”

Synthesis and spectroelectrochemistry of transition metal carbonyls with 1,1′-bis(phosphino)metallocene ligands

“…The compounds containing dippf and dcpf were prepared in good yields using methods similar to that used to prepare Group VI [10] and VII [16] analogs containing dppf. However, all attempts at preparing [Mn(CO) 3 Br(dcpf)] and compounds containing the dtbpf ligand failed.…”

Synthesis and reactivity of germyl complexes of manganese and rhenium

“…It should be noted that this is not the main disposition for tricarbonyldiphosphanemanganese complexes [27], but it has been found previously, for example, in the closely related complex Mn(SnH 3 )(CO) 3 [PPh(OEt) 2 ] 2 [10a]. The coordination polyhedron around the manganese may be defined as an octahedron, but some distortion is found in the carbonylmanganese-carbonyl axis, with a C(1)eMneC(2) angle of 162.7(1) , bent toward the position occupied by the germyl ligand.…”