Phosphino complexes

Tetrakis phosphino complexes of nickel(O) readily react with aliphatic and aromatic nitro compounds RN02 to afford the corresponding nitroso complexes of nickel(0) [Ni(PR3)2(RNO)] and the phosphine oxide. Kinetic studies have been carried out to elucidate the mechanism of this oxygen transfer reaction. The reaction mechanism shown in equations (30)-(32) has been postulated.193... 

Phosphino complexes of nickel(O) such as Ni(PPh3)4, Ni(PEt3)3 and Ni(PCy3)2 have been found to react easily at room temperature with PhX (X = Cl, I), Mel, EtBr and other organohalogens or pseudohalogens affording nickel(II) compounds (equation 88).139,270-272... 

The first general synthesis of neutral complexes Ni C R is given in equation (212).2109 Mixed-ligand phosphino complexes were also prepared according to equations (213) and... 

Re(CO)3(MeCN)3]PF6 has been prepared and this compound appears to be a useful precursor for the preparation of cationic rhenium carbonyl compounds.625 Carbonylation of tertiary phosphino-complexes under reducing conditions provides a convenient synthetic route to rhenium mono- and poly-carbonyl complexes.626... 

Example 8.9. Olefin hydrogenation with Wilkinson s catalyst. Wilkinson s catalyst is a dihydrido-chloro-phosphino complex of rhodium, H2RhClPh3, where Ph is an organic phosphine such as triphenyl phosphine [48-52]. The dominant mechanism of olefin hydrogenation with this catalyst, established chiefly by Halpem [53-55] in detailed studies that included measurements of equilibria in the absence of reactants and of reaction rates of isolated participants, backed by independent NMR studies [56] and ab initio molecular orbital calculations [57], is shown as 8.69 on the facing page (without minor parallel pathways and side reactions). 

HMe2Si-SiMe2H in an inert solvent was investigated. Formation of the expected hydrido-disilanyl complex /wer-(CO)3(PPh3)Fe(H)(SiMe2-SiMe2H) was not observed but Instead a di(hydrido)-bis(phosphino) complex was isolated. 

Application of Sten ca Iiy Demanding Bis(phosphino) Complexes in Ethene Homopoiymerization 47... 

Phosphino complexes of type R3PAUCI3 can be made by oxidative addition of CI2 to Ph3PAuCl. 

Benzene, l-(methylphenylarsino)-2-(methylphenyl-phosphino)-complexes chirality, 199... 

Summary Mixed functionalized octa( -alkyl/halogenalkylsilsesquioxanes) with different side chains has been prepared by acid-catalyzed cohydrolysis of w-alkyl- and lialogenalkyltrichlorosilanes. The silsesquioxane mixtures were separated in preparative amounts with normal-phase HPLC. Mixed functionalized octa( -alkyl/halogenalkylsil-sesquioxanes) with different side chains are suitable examples of an organically modified silica gel. They can be modified by nucleophilic substitution of the halogen atom with -PPh and rhodium-phosphino complexes are be formed. 

The following series of phosphino complexes have been reported ... 

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