however, this reaction requires an inert atmosphere. While W(CO)6 reacts rapidly with amines to give cis diamine adducts in high yields, direct reactions with phosphines are not so clean. Bis(phosphine) complexes are, however, cleanly formed when a small amount of piperidine is added to the reaction mixture, presumably via the bis(piperidine) complex cis-[W(CO)4(pip)2]. Reactions with Cr(CO)6 generally
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。
Preparation and Properties of Nitrosyl Complexes of Molybdenum
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
Reaction of trans-Mo(N2)2(Ph2PCH2CH2PPh2)2 with aldehydes and aldehydic compounds, alcohols, and hydroaromatic compounds: Stoichiometric decarbonylation and dehydrogenation
作者:T. Tatsumi、H. Tominaga、M. Hidai、Y. Uchida
DOI:10.1016/s0022-328x(00)84617-3
日期:1981.7
alcohol (R3OH), and alkane (R4H)] and molybdenumcarbonylcomplexes. The formation of the products is accounted for by assuming oxidativeaddition of the compounds to molybdenum, involving the cleavage of the formyl CH bond followed by decarbonylation. Reactions of primary alcohols (RCH2OH) yield alkane (RH) and a mixture of molybdenumcarbonylcomplexes and molybdenum hydride. Reactions of secondary alcohols