Reactivity of [M(CO)4(nbd)] (M = Cr or Mo; nbd = norbornadiene) toward (Ph2PN)C(Ph)[N(SiMe3)2] and C6H4{C[N(SiMe3)2]-(NPPh2)}2-1,4

Wai Kwok Wong, Chaode Sun, Tao Jiang, Wing Tak Wong, Feng Xue, Thomas C.W. Mak

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Abstract

The interaction of (Ph2PN)C(Ph)[N(SiMe3)2] with 1 equivalent of [M(CO)4(nbd)] (M = Cr or Mo, nbd = norbornadiene) in diethyl ether gave cis-[M(CO)4{(Me3SiN)C(Ph)(NHPPh2}] (M = Cr 1 or Mo 2) in good yield. The interaction of C6H4{C(NPPh2)[N(SiMe3)2]}2-1,4 with 2 equivalents of [M(CO)4(nbd)] (M = Cr or Mo) in tetrahydrofuran gave the symmetric dimer cis-[{M(CO)4} {(Ph2PNH)(Me3SiN)CC6H4C(NSiMe3)(NHPPh2)}] (M = Cr 3 or Mo 4) in moderate yield. However, in diethyl ether, this reaction (M = Mo) gave the unsymmetric cis-[(OC)4Mo{(Ph2PNH)(Me3SiN)CC6H4C[N(SiMe3)2](NPPh2)}Mo(CO)5] 5 in moderate yield. Compounds 1-5 have been fully characterized by analytical and spectroscopic methods and the structures of 3 and 5 have been established by X-ray crystallography. A 1,3-silyl shift mechanism has been proposed for the formation of the products. The NH proton of the bidentate iminophosphine ligand undergoes facile deuterium exchange with D2O at ambient temperature.
Original languageEnglish
Pages (from-to)693-698
Number of pages6
JournalJournal of the Chemical Society - Dalton Transactions
Issue number4
DOIs
Publication statusPublished - 21 Feb 1997
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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