Inorganic Chemistry, Vol.51, No.12, 6851-6859, 2012
{4-t-Bu-2,6-[P(O)(O-i-Pr)(2)](2)C6H2Sn}(2): An Intramolecularly Coordinated Organotin(I) Compound with a Sn-Sn Single Bond, Its Disproportionation toward a Diorganostannylene and Elemental Tin, and Its Oxidation with Phl(OAc)(2)
Syntheses of the intramolecularly coordinated organotin(I) compound {4-t-Bu-2,6-[P(O)(O-i-Pr)(2)](2)C6H2Sn}(2) (2), which crystallized in two different pseudopolymorphs 2 and 2 center dot C7H8, of the diorganostannylene {4-t-Bu-2,6-[P(O)(O-i-Pr)(2)](2)C6H2}(2)Sn (3) and of the organotin(II) acetate 4-t-Bu-2,6-[P(O)(O-i-Pr)(2)](2)C6H2SnOAc (4) are reported. The compounds were characterized by multinuclear NMR, IR (3 and 4), UV-vis spectroscopy (2), electrospray ionization mass spectrometry (3 and 4), and single-crystal X-ray diffraction analyses. Density functional theory calculations on compound 2 revealed the stabilizing effect of the intramolecular P=O -> Sn coordination.