Phthalocyanine Complexes of Ruthenium(II)

Heating a mixture of RuCl3H2O and o-cyanobenzamide in naphthalene to 290 oC for 1 h, followed by cooling, addition of EtOH to the residue, filtering the suspension, and drying gave a solid residue which was Soxhlet-extracted with glacial HOAc, dried, and reextracted with pyridine or its derivatives to give RuPcL2 (I; H2Pc = phthalocyanine, L = pyridine, 4-methylpyridine, 4-tert-butylpyridine). CO was bubbled through a refluxing solution of RuPcL2 in diglyme to give RuPcL(CO) (II). Refluxing of Ru3(CO)12 and PcH2 in PhCN gave a dark blue solid, probably RuPc(CO), which upon Soxhlet extraction with pyridines gave II also.