ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Coordination Chemistry of Functional Phosphorus Ylides. VII. Pentacarbonylmetal Complexes of Cyanomethylene Triphenylphosphorane, [Ph3P=CH(CN)] · M(CO)5 (M = Cr, Mo, W)The pentacarbonyl complexes [Ph3P=CH(CN)] · M(CO)5 (1a-c) are obtained by reaction of the irradiated metal hexacarbonyls M(CO)6 (M = Cr, Mo, W) with cyanomethylene triphenylphosphorane under exclusion of light. The IR and NMR spectra indicate N-coordination of the ligand, that means a nitrile complex. The chromium complex 1a crystallizes triclinic (space group P1, Z = 2) with the lattice constant a = 1126.5(2), b = 1153.6(3), c = 951.4(3) pm; α = 103.47(3), β = 102.04(3), γ = 84.00(2)°. The linear array of the ligand atoms C7, C6, N forms an angle of 168.1(5)° with the metal-nitrogen bond. Significant bond distances are Cr—N = 206.2(6), N—C6 = 115.3(7), C6—C7 = 137.2(8) and P—C7 = 170.9(5) pm.
Notes:
Durch Umsetzung der photochemisch aktivierten Metallhexacarbonyle M(CO)6 (M = Cr, Mo, W) mit Cyanmethylen-triphenylphosphoran unter Lichtausschluß erhält man die Pentacarbonyl-Komplexe [Ph3P=CH(CN)] · M(CO)5 (1a-c). Die IR- und NMR-Spektren weisen auf N-Koordination des Liganden, d. h. auf einen Nitrilkomplex hin. Der Chromkomplex 1a kristallisiert triklin (Raumgruppe P1, Z = 2) mit den Gitterkonstanten a = 1126,5(2), b = 1153,6(3), c = 951,4(3) pm; α = 103,47(3), β = 102,04(3), γ = 84,00(2)°. Die linear angeordneten Ligandatome C7, C6, N bilden mit der Metall-Stickstoff-Bindung einen Winkel von 168,1(5)°. Die wichtigsten Bindungsabstände betragen Cr—N = 206,2(6), N—C6 = 115,3(7), C6—C7 = 137,2(8) und P—C7 = 170,9(5) pm.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19845160913
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