Neutral and anionic pentafluorophenyl complexes of palladium and platinum(II) and their reactivity towards amines |
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| Authors: | Rafael Usón Juan Forniés Pablo Espinet Rafael Navarro Elena Lalinde |
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| Institution: | (1) Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Zaragoza, Zaragoza, Spain |
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| Abstract: | Summary The (n-Bu4N)M(C6F5)3(CNR)] complexes (M=Pd or Pt; R=p-Tolyl, Me, Cy ort-Bu, prepared from (n-Bu4N)M(C6F5)3(tht)] (tht = tetrahydrothiophene) and the appropriate isocyanide, RNC, prove to be unreactive towards benzylamine or MeOH. Thetrans-Pd(C6F5)2(CNR)2] complexes react slowly with benzylamine to give the corresponding carbene complexestrans-Pd(C6F5)2{C(NHR)(NHBz)}2], the rate of the reaction decreasing in the order:p-Tolyl > Me > Cy  t-Bu (for R=t-Bu the carbene complex cannot be prepared). In the corresponding Pt complexes a marked decrease in reactivity is observed and only the most reactive isonitrile complex (R=p-Tolyl) gives the carbene complextrans-Pt(C6F5)2{C(NHTolyl-p)(NHBz)}2}. Thecis-M(C6F5)2(CNTolyl)2] complexes do not show any change in reactivity compared to the correspondingtrans-complexes, and givecisM(C6F5)2{C(NHTolyl-p)(NHBz)}2]. |
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