Synthesis and Properties of Iron-Group Hydrido-Cyano Complexes Trans-[M(CN)(L)2], M = Fe, Ru, Os, L = depe, dppm, dppe, dppp, dtpe and Their Hydrogen-, Trifluoroboron- and Triphenylboron-Isocyanide Derivatives of The Type trans-[Mh(Cnh)(L)2]Otf, trans-[Mh(CNBX3)(L)2], X = F Or Ph And trans-[M(H2)(CNBF3)(dppp)2]BF4