ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Reactions of Phosphorus Ylides with Transition Metal Compounds, VII. Nitrile Complexes of the Type (CO)5CrL, Synthesis and Reaction with MethylenetriphenylphosphoranePentacarbonyl(tetrahydrofuran)chromium(0) reacts with nitriles to yield the stable (CO)5CrNCR complexes 1 -12. Depending on the substituent R, their reactions with (C6H5)3P=CH2 lead to substitution of the nitrile ligand with formation of the known complex (CO)5C̄r-CH2=(C6H5)3 or to nucleophilic attack on the nitrile carbon to yield the new ketimine complexes (CO)5CrNH = CR=CH = P(C6H5)3 (14-21) which exist as cis and trans isomers. All complexes are characterized by their IR and NMR spectra. The reaction of the ketimine complex 14 (R = CH3) with HBF4 yields cis- and trans=[(C6H5)3P=CH = C(NH2)CH3]BF4 (22).
Notes:
Pentacarbonyl(tetrahydrofuran)chrom(0) reagiert mit Nitrilen zu den stabilen (CO)5CrNCR-Komplexen 1-12. Ihre Reaktion mit (C6H5)3P = CH2 führt in Abhängigkeit von dem Substituenten R entweder zu einer Verdrängung des Nitrilliganden unter Bildung von (CO)5C̄r-CH2=(C6H5)3 oder zu einem nucleophilen Angriff am Nitrilkohlenstoff unter Bildung der neu-artigen Ketiminkomplexe (CO)5CrNH = CR=CH = P(C6H5)3 (14-21), die jeweils als cis- und trans-Isomere auftreten. Alle Komplexe werden anhand ihrer Spektren sowie analytisch charakterisiert. Die Reaktion des Ketiminkomplexes 14 (R = CH3) mit HBF4 führt zu cis- und trans-[(C6H5)3P=CH = C(NH2)CH3]BF4 (22).
Additional Material:
5 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19791120739
