ChemInform Abstract: SYNTHESIS AND MOLECULAR STRUCTURE OF NIOBOCENECARBONYLMANGANESEPENTACARBONYL WITH A NIOBIUM‐MANGANESE BOND AND AN ASYMMETRIC CARBONYL BRIDGE

Abstract

Das aus dem Boranat (I) unter Triethylamin‐Einwirkung entstehende Niobocenhydrid (II) wird mit Mng ‐ (CO)", zur Titelverbindung (III) (IR‐Daten) umgesetzt.

Monophosphido-bridged early/late heterobimetallic complexes: cooperative activation of carbon monoxide

“…In addition, cyclic voltammetry of 1 showed no redox activity in the range +1.0 to -1.5 V vs Ag/AgCl. Similar lack of reactivity observed for the related complexes CpaZr^-OCMeMTjV-OCIMoiCOICp,1'^Cp2Nb-(M-CO)(»?1-7,2-OC)Mo(CO)Cp, 22 and Cp2Ti(M-CR)(7,V-OC)W(CO)Cp1'8'w was attributed to the steric demands of the cyclopentadienyl rings on the two constituent metal atoms. In the case of 1, the steric demands are enhanced by the presence of the diphenylphosphido moiety.…”

P−C and C−H Bond Cleavages in the Photochemical Reactions of [Fe2(η5-C5H5)2(CO)4] with Bis(diphenylphosphino)methane

“…10 There is also at least one precedent of a C-H bond cleavage of an iron-bound cyclopentadienyl ligand under "dark" conditions, this occurring in the reaction between [NbCp 2 H] and [FeCp(Me)-(CO) 2 ] to give [NbCp 2 H(µ-η 1 :η 5 -C 5 H 4 )Fe(CO) 2 ] after extrusion of methane. 11 As we will next discuss, the photochemical reactions of 1 with dppm are rather complex, and not only C-H (Cp) or P-C (dppm) bond cleavages have been detected, but also unexpected reductive C-C couplings between the fragments generated after the initial bond cleavage steps.…”

Cooperative activation of carbonyl by early/late heterobimetallics: reactions of [Cp2M(.mu.-PR2)]2 (M = Ti, Zr) with [CpMo(CO)3]2

“….465(8) 06-07 1.478(8) Angles(deg) 02-Mo-Cl86.6 (2) C3-Mo--Cl88.4 (2) C3-Mo-C291.4 (2) 04-Ti-Ol78.5 (1) 01-01 -Ti 145.0 (3) 04-04-Ti 126.3 (3) 07-04-Ti 123.0 (3) 07-04-04 108.3 (3) 01-01 -Mo 178.0 (4) 02-02-Mo 177.4 (5) 03-03-Mo 176.7 (4) 05-04-04 106.1 (4) 06-05 -04 104.0 (4) 07-06-05 105.1 (4)06-07 -04106.3 (4) …”