Coordination chemistry of the water-soluble ligand TPPTP and formation of a [Mo(CO)5(m-TPPTP)] monolayer on an alumina surface

Brandy A Harper; D Andrew Knight; Clifford George; Susan L Brandow; Walter J Dressick; Charles S Dulcey; Terence L Schull

doi:10.1021/ic025862a

Coordination chemistry of the water-soluble ligand TPPTP and formation of a [Mo(CO)5(m-TPPTP)] monolayer on an alumina surface

Inorg Chem. 2003 Jan 27;42(2):516-24. doi: 10.1021/ic025862a.

Authors

Brandy A Harper¹, D Andrew Knight, Clifford George, Susan L Brandow, Walter J Dressick, Charles S Dulcey, Terence L Schull

Affiliation

¹ Department of Chemistry, Loyola University, 6363 St. Charles Avenue, New Orleans, Louisiana 70118, USA.

PMID: 12693234
DOI: 10.1021/ic025862a

Abstract

Phosphonate and phosphonic acid functionalized phosphine complexes of platinum(II) were prepared via direct reaction of the ligands with K2PtCl4 in water. Either cis or trans geometries were found depending on the nature of the ligand. The crystal structure of P(3-C6H4PO3H2)3.2H2O (6b) (triclinic, P1, a = 8.3501(6) A, b = 10.1907(6) A, c = 14.6529(14) A, alpha = 94.177(6) degrees, beta = 105.885(6) degrees, gamma = 108.784(5) degrees, Z = 2) shows a layered arrangement of the phosphonic acid. The phosphonodiamide complex cis-[PtCl2(P[4-C6H4PO[N(CH3]2]]3)2].3H2O (10) was synthesized in 89% yield and hydrolyzed to the phosphonic acid complex using dilute HCl. Aqueous phase and silica gel supported catalytic phosphonylation of phenyl triflate using palladium phosphine complexes was achieved. A molybdenum complex, Mo(CO)5[P3-C6H4PO3H2)3] (11), was synthesized in situ and grafted to an alumina surface. XPS, RBS, and AFM studies confirm the formation of a monolayer of 11 on the alumina surface.