Protoporphyrin IX (H,PPIX) complexes of diorganotin(1V)chloro moieties with formula (R2SnC1),H,PPIX (R = Me, Bu and Ph) have been obtained and their solid-state and solution-phase configurations have been studied through spectroscopic investigations.Coordination of the side-chain carboxylates of H4PPIX to R,Sn(IV)CI moieties, with bridging carboxylate (COO-) has been inferred by comparison of the free and coordinated H,PPIX IR spectra, while the occurrence of a five-coordinated tin(1V) atom in a cis-R, trigonal bipyramidal structure has been deduced, for all of the synthesized complexes, by rationalization of the nuclear quadrupole splitting parameters, according to the point-charge model formalism. Finally, the solution-phase spectral features of (R,SnCI),-H,PPIX are in agreement with the monomeric character of the protoporphyrin IX, under the experimental conditions used.