207405-90-1Relevant academic research and scientific papers
Carbodiimide metal complexes and four-membered metallacycles from isocyanide metal precursors and aryl azides
Werner,Hoerlin,Mahr
, p. 367 - 373 (1998)
The reaction of C5H5Co(CNR)(PMe3) (R=CH2Ph, C6H11) with aryl azides ArN3 leads to a mixture of products with the carbodiimide complexes C5H5Co(κ2-C,N-RN=C=NAr)(PMe3) (3, 4) and the four-membered metallacycles C5H5Co[κ2-C,C-C(NR)N(Ar)C(NR)](PMe 3) (5, 6) being the dominating species. For R=C6H11 and Ar=C6H5, an equilibrium between 6 and the isomer C5H5Co[κ2-C,C-C(NAr)N(R)C(NR)](PMe 3) (7) has been confirmed by NMR spectroscopy. Treatment of C5H5Rh(CNMe)(PMe3) with ArN3 affords exclusively the carbodiimide complexes C5H5Rh(κ2-C,N-MeN=C=NAr)(PMe3) (9, 10) in good yields. Methylation of 9 and 10 with CF3SO3Me, in the presence of NH4PF6, gives the cyclic carbene-type derivatives 11 and 12, of which the first has been characterized by X-ray crystal structure analysis.
