A spacer-linked molecular diorganotin oxide

The synthesis and molecular structure are reported of the first example of a diorganotin oxide, {p-[R(O)SnCH2SiMe2]2C6H4}3 (3) (R = (Me3Si)2CH), in which two six-membered Sn3O3 units are linked by three -CH2Si(Me)2C6H4Si(Me)2CH2- spacers. <br /

Organostannanes derived from (-)-menthol: controlling stereochemistry during the preparation of (1R,2S,5R)-menthyldiphenyltin hydride and bis((1R,2S,5R)menthyl)phenyltin hydride

Dakternieks, Dainis; Dunn, Kerri; Henry, David J.; Schiesser, Carl H.; Tiekink, Edward R. T

a,w-Bis(trichlorostannyl)alkanes: Unravelling the hydrolysis pathway to organotin-oxo oligomers

New &alpha;,&omega;-bis(trichlorostannyl)alkanes, Cl3Sn(CH2)nSnCl3 [n = 3-5, 8], have been synthesized via tin-phenyl bond cleavage reactions on &alpha;,&omega;-bis(triphenylstannyl)alkanes, Ph3Sn(CH2)nSnPh3 [n = 3-5, 8], using either SnCl4 or concentrated hydrochloric acid. Some key missing links, (H2O)Cl3Sn(CH2)3SnCl3(H2O) (1a) and (H2O)2Cl3Sn(CH2)3SnCl3(H2O)2 (6), in the hydrolysis pathway of organotin trichlorides were identified. Crystal structures of the nonassociated di-tin compounds (H2O)Cl3Sn(CH2)3SnCl3(H2O) (1a) and (H2O)2Cl3Sn(CH2)3SnCl3(H2O)2 (6, isolated as the 18-crown-6 cocrystal acetonitrile solvate) as well as the polymeric hydrolysis product [H2O(OH)Cl2Sn(CH2)3SnCl2(OH)H2O&middot;2H2O]n (7&middot;2H2O) are reported. <br /

Synthesis and Characterization of the First Sandwich Complex of Trivalent Thorium: A Structural Comparison with the Uranium Analogue

Reduction of the bulky 8-annulene thorium complex [Th{COT(TBS)2}2] (COT(TBS)2 =¿-C8H6(tBuMe2Si)2-1,4) by potassium yields the anionic compound {Th[COT(TBS)2]2}(DME)2, which was crystallographically characterized and is the first sandwich complex of Th(III). EPR spectroscopy indicates that the molecule possesses a 6d1 ground state. A structural comparison is made with the isostructural uranium(III) complex and the thorium(IV) parent compound