342371-85-1Relevant articles and documents
Hypercoordinated organotin(IV) compounds containing C,O- and C,N- chelating ligands: Synthesis, characterisation, DFT studies and polymerization behaviour
Khan, Aman,Pau, Jeffrey,Loungxay, Julie,Magobenny, Timbila,Wylie, R. Stephen,Lough, Alan J.,Foucher, Daniel
, (2019/09/12)
A series of 2-methoxymethyl tetraorganotins [2-(MeOCH2)C6H4]SnR3 (21: R = Ph; 22: R = n-Bu; 23: R = Me), diorganotin chlorides [2-(MeOCH2)C6H4]R2SnCl (24: R = Ph; 25a, 25b: R = n-Bu), monoorganotin dichlorides [2-(MeOCH2)C6H4]RSnCl2 (26: R = Ph; 27: R = n-Bu; 28: R = Me) and the tin trichloride [2-(MeOCH2)C6H4]SnCl3 (29) were successfully prepared from the reaction of the organolithium, [2-(MeOCH2)C6H4]Li, and the appropriate chlorostannane. Similarly, a series of dimethylamino stannanes including the tetraorganotin [2-(Me2NCH2)C6H4]SnPh3 (30), the diorganotin halides [2-(Me2NCH2)C6H4]Ph2SnX (34: X = Cl; 35: X = Br), dichlorides [2-(Me2NCH2)C6H4]RSnCl2 (38: R = Ph; 39: R = n-Bu; 40: R = Me) and the tribromide [2-(Me2NCH2)C6H4]SnBr3 (37) were prepared by reaction of the appropriate organochlorostannane and the organolithium [2-(Me2NCH2)C6H4]Li followed by selective halogenations in the case of 34–37. 2-Methoxymethyl and dimethylamino diorganotin dichlorides (27, 28 and 39, 40) were hydrogenated with LiAlH4 to produce new 2-methoxymethyl [2-(MeOCH2)C6H4]RSnH2 (41: R = n-Bu; 42: R = Me) and dimethylamino [2-(Me2NCH2)C6H4]RSnH2 (44: R = n-Bu; 45: R = Me) dihydrides. X-ray structure determination of 30 revealed a nearly tetrahedral stannane, while structural analysis of 24, 29 and 40 display distorted trigonal bipyramidal geometry at Sn with Cl trans to the datively coordinated heteroatom. A selection of DFT methods were assessed for accuracy in predicting the solid-state geometries of the hypercoordinate Sn complexes. Catalytic dehydrocoupling of C,O- (41) and C,N- (44) diorganotin dihydrides was explored using Wilkinson's catalyst at RT leading to the recovery of modest molecular weight polymers (52: Mw = 3.03 × 104 Da, PDI = 1.4, 53: Mw = 3.1 × 104 Da, PDI = 1.86). The new rigid polymers were isolated in moderate (52: 65%) and low yields (53: 18%) and were found to be amorphous by DSC.
Monomeric triorganotin(IV) fluorides containing a C,N-chelating ligand
Bares, Josef,Novak, Petr,Nadvornik, Milan,Jambor, Roman,Lebl, Tomas,Cisarova, Ivana,Ruzicka, Ales,Holecek, Jaroslav
, p. 2967 - 2971 (2008/10/09)
The set of four triorganotin(IV) fluorides of general formula {2-[(CH 3)2NCH2]C6H4}R 2SnF, where R is Me (5), n-Bu (6), t-Bu (7), and Ph (8), respectively, has been prepared and characterized using NMR and ESI-MS techniques. The structures of crystalline compounds 5 and 8 were determined using X-ray methods. All compounds are monomeric both in solution using different solvents and in the solid state. The tin central atom is five-coordinated with all carbon atoms in equatorial positions and fluorine and nitrogen, from the intramolecularly coordinated dimethylamino group, in the axial positions of the distorted trigonal bipyramid. The ability of compounds 6 and 8 to perform fluorination of organometallic chlorides was tested on titanocene dichloride. A quantitative yield of Cp2TiF2 was obtained.
