Reaktionen von carben-komplexen mit tetramethylcyanoguanidin

Helmut Fischer, Friedrich Seitz, Gerhard Müller

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Abstract

Tetramethylcyanoguanidine, NCNC(NMe2)2, reacts with pentacarbonyl-[methoxy(phenyl)carbene]chromium, (CO)5Cr[C(Ph)OMe], via substitution of the carbene ligand to give pentacarbonyl(tetramethylcyanoguanidine)chromium. X-ray structure analysis shows that the CrNCN fragment is nearly linear in the crystal, and that the CNC angle is 122.9(1)°. In solution rapid syn-anti isomerization at the NC double bond occurs. The reaction of tetramethylcyanoguanidine with pentacarbonyl[acetoxy(phenyl)carbene]-chromium and -tungsten, (CO)5M-[C(Ph)OCO(O)Me] (M = Cr, W), yields (CO)5M[C(PHNC(NMe2)2], where the acetoxy group of the carbene ligand is exchanged for the NC(NMe2)2 group of the cyanoguanidine.

Original languageGerman
Pages (from-to)185-195
Number of pages11
JournalJournal of Organometallic Chemistry
Volume320
Issue number2
DOIs
StatePublished - 10 Feb 1987
Externally publishedYes

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