METALLOPORPHYRINS WITH METAL METAL BONDS - SYNTHESIS AND CHARACTERIZATION OF (P)INMN(CO)5, (P)INCO(CO)4, (P)INCR(CO)3CP, (P)INMO(CO)3CP, AND (P)INW(CO)3CP - MOLECULAR STEREOCHEMISTRY OF [(2,3,7,8,12,13,17,18-OCTAETHYLPORPHYRINATO)INDIUM(III)]PENTACARBONYLMANGANESE)