Preparation and Characterization of the Argentates: Ag?P(CF3)2!2(-), Ag?(mu-P(CF3)2)M(CO)5!2(-) (M = Cr, W) and Ag?mu-P(C6F5)2)W(CO)5!2(-): X-Ray Crystal Structure of K(18-Crown-6)Ag?mu-P(CF3)2)Cr(CO)5!2
AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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The novel bisbistrifluoromethylphosphanido argentate, AgPCF322-, is obtained via the reaction of HPCF32 with AgCN2- and isolated as its K18-crown-6 salt. If the cyclic phosphane PCF34 is reacted with a slight excess of K18-crown-6AgPCF322 a selective insertion of one PCF3 unit into each silver phosphorus bond is observed, giving NMR spectroscopic evidence for the AgPCF3PCF322- ion. On treatment of the phosphane complexes MCO5PHCF32 M Cr, W with K18- crown-6AgCN2 the formation of the comparable trinuclear argentates, Agmu PCF32MCO52- is achieved. The chromium compound K 18-crown-6 Agmu PCF32CrCO52 crystallizes in a non-centrosymmetric space group Fdd2 no. 43, a 2970.26 pm, b 1584.53 pm, C 1787.04, V 8.4103cu nm, Z 8. The C2 symmetric anion, Agmu-PCF32CrCO52-, shows a nearly linear arrangement of the P-Ag-P unit and represents the first example of a structurally characterized perfluorinated phosphanido-metal complex. Although, the bispentafluorophenylphosphanido compound AgPC6F522- could not be obtained so far, the synthesis of its trinuclear counterpart, K18-crown-6 Ag mu-PC6F52WCO5 2 was successful.
- Physical Chemistry
- Atomic and Molecular Physics and Spectroscopy