Preparation, Structures, and Some Reactivities of Five-Coordinate Alkyne Complexes of Mo with Tetraphosphine or Diphosphine Coligand [Mo(RC≡CR′){<i>meso</i>-<i>o</i>-C<sub>6</sub>H<sub>4</sub>(PPhCH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>)<sub>2</sub>}] and [Mo(RC≡CR′)(Ph<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>)<sub>2</sub>]
作者:Fumiya Niikura、Hidetake Seino、Yasushi Mizobe
DOI:10.1021/om800615a
日期:2009.2.23
products from coordinated alkynes including cis/trans-alkenes and/or alkanes, the yields of which depend upon the nature of the alkynecomplexes and the amounts of acid. From the reactions of 3a with HBF4·Et2O under the controlled conditions, two intermediatecomplexes were isolated, namely, a hydridoalkyne complex [MoH(η2-MeC≡CCOOMe)(κ4-P4)][BF4] and an η3-allyl complex [Mo(η3-CH2CHCHCOOMe-κO)(κ4-P4)][BF4]
hydrazido(2−) complexes such as [WI(NNH)(dpe)2] and [WI2(NNH2)(PMe2Ph)3] from [WI(NNSiMe3)(dpe)2] and mer-[WI2(NNHSiMe3)(PMe2Ph)3], respectively. When reduced with excess Na in THF under N2, complexes trans-[MI(NNSiMe3)(PMe2Ph)4] (M=Mo or W) and mer-[WI2(NNHSiMe3)(PMe2Ph)3] gave (Me3Si)2NH and NH3 in substantial yields, accompanied by the regeneration of the parent dinitrogencomplexes. Additional amount
Preparation and properties of dinitrogenmolybdenum complexes
作者:T Tatsumi、H Tominaga、M Hidai、Y Uchida
DOI:10.1016/s0022-328x(00)84523-4
日期:1980.10
The complexesMo(CO)L(DPE)2 (L = amides, imidazoles, amines, nitriles, pyridines, and olefins; DPE = Ph2PCH2CH2PPh2) have been obtained by the reaction of trans-Mo(CO)(N2)(DPE)2 · C6H6 or Mo(CO)(DPE)2 with the corresponding ligand. The CO stretching vibrations in the IR spectra of these complexes are found in the range of 1680–1880 cm−1. The variation in v(CO) is interpreted in terms of donor and
通过反式-Mo(CO)的反应获得了配合物Mo(CO)L(DPE)2(L =酰胺,咪唑,胺,腈,吡啶和烯烃; DPE = Ph 2 PCH 2 CH 2 PPh 2)。)(N 2)(DPE)2 · C 6 H 6或具有相应配体的Mo(CO)(DPE)2。这些配合物的红外光谱中的CO拉伸振动在1680–1880 cm -1范围内。v(C = O)的变化是根据配体的供体和受体性质来解释的。v极低酰胺和咪唑的配合物的(CO)可能是由于其强大的π供体性质。含有腈,NH 3和4-氨基吡啶的配合物是稳定的,但在N 2下重结晶时其他配体容易丢失,从而获得反式-Mo(CO)(N 2)(DPE)2 · C 6 H 6。配体的配位能力也受其体积的很大影响。在反式-Mo(N 2)2(DPE)2与NH 3的反应中,一分子的连接二氮被取代,得到Mo(N 2)(NH 3))(DPE)2。
Syntheses, Structures, and Reactivities of Heterobimetallic Bridging Dinitrogen Complexes Containing Group 6 and Group 4 or 5 Transition Metals<sup>1</sup>
heterobimetallic dinitrogen complexes containing group 6 and group 4 or 5 transition metals were synthesized by the reaction of the tungsten or molybdenum dinitrogen complexes cis-[W(N2)2(PMe2Ph)4] (1) and trans-[M(N2)2(dppe)2] (2) (M = W, Mo) with group 4 or group 5 compounds such as [CpTiCl3], [Cp2M‘Cl2] (M‘ = Ti, Zr, Hf), or [Cp‘M‘Cl4] (Cp‘ = Cp, Cp*; M‘ = Nb, Ta). Crystallographic studies of the complexes thus
Some nitrosyl complexes exhibit cis-trans isomerism. Reactions of the nitrosyl complexes with protonic acids afford the corresponding nitroxyl complexes or the anion substitution products. Cationic nitrosyl complexes are obtained by the reactions of Mo(CO)L(dpe)2 (L=N2 or C2H4) and Mo(C2H4)2(dpe)2 with NOPF6. Attempts were also made to prepare nitrosyl complexes of molybdenum by use of other nitrosylating