The first tin(IV) porphyrin complex with chiral amino acid ligands: synthesis, characterization and X-ray crystal structure of trans-bis(L-prolinato)[5,10,15,20-tetrakis(4-pyridyl)porphyrinato]tin(IV)

Abstract

The tin(IV) porphyrin complex with chiral amino acid ligands trans-bis(L-prolinato)[5,10,15,20-tetrakis(4-pyridyl) porphyrinato] tin(IV) (1) was synthesized and fully characterized. The X-ray crystal structural analysis of 1 reveals that the Sn(IV) center is octahedrally coordinated by the porphyrin occupying the square base and axial coordination of two L-prolinate ligands in trans-position with respect to each other. The pyrrolidine rings of the L-prolinate ligands in 1 exhibit a C-s-C-beta-exo envelope conformation with C-s symmetry. The non-classical hydrogen bonding interactions mainly contribute to assemble 1 into a one-dimensional packed structure.