Übergangsmetallphosphidokomplexe,IX. P-funktionelle Heterocyclische Mangan-Phosphor-Vier- und Sechsringkomplexe

Transition Metal Phosphido Complexes. IX. P-Functional Heterocyclic Manganese Phosphorus Four- and Six-Membered Ring Complexes . From the reaction of Me₃SiPH₂ with (CO)₅MnCl the four-membered ring complex (CO)₄MnPH₂]₂ 1 and the six-membered ring complex (CO)₄MnPH₂]₃ 2 are available. Using CCl₄, CBr₄, and CI₄ 1 can be halogenated by hydrogen-halogen exchange yielding (CO)₄MnPCl₂]₂ 3 , (CO)₄MnPBr₂]₂ 4 , and (CO)₄MnPI₂]₂ 5 , respectively. The corresponding reactions of 2 lead to the formation of completely P-halogenated six-membered ring complexes only in the case of CCl₄ to give (CO)₄MnPCl₂]₃ 6 . Upon heating in solution 6 is converted into 3. 3, 4 , and 5 react with AgBF₄] yielding (CO)₄MnPF₂]₂ 7 . (CO)₄MnPF₂]₃ 8 is formed reacting 6 with AgBF₄]. Considerable differencies in reactivity depending upon the ring size are observed in all P-substitution reactions. I.R., N.M.R. and mass spectral data are reported.