Metalmetal spin coupling through chalcogenides. Correlation of 2J(119Sn, 119Sn) with molecular structure. Crystal structure of [(2-MeC6H4CH2)3Sn]2O and [(2-MeC6H4)3Sn]2O

Hexakis(2,4,6-triisopropylphenyl)cyclotristannoxane - a Molecular Diorganotin Oxide with Kinetically Inert Sn-O Bonds

“…Indeed, monoclinic (a-form) and triclinic (b-form) modifications have been reported for (t-Bu 2 SnS) 2 [31]. However, both 119 Sn MAS chemical shifts are consistent with the respective value of cyclo-(t-Bu 2 SnS) 2 in CDCl 3 solution (d 124.1) [27]. The graphical integration of the signals was achieved by taking into account the intensity of the center bands and all spinning sidebands belonging to them.…”

“…Interestingly, the 2 J( 119 Sn± O± 117 Sn) coupling of 501 Hz is significantly bigger as compared to the corresponding coupling in the closely related diaryltin oxide cyclo-[(2,6-Me 2 ±C 6 H 3 ) 2 SnO] 3 (320 Hz), [27] as well as in cyclo-(t-Bu 2 SnO) 3 (369 Hz), [4] cyclo-[(Me 2 EtC) 2 SnO] 3 (394 Hz), [4] and cyclo-[(Me 3 SiCH 2 ) 2 SnO] 3 (335 Hz) [2]. This difference, especially in comparison with cyclo-[(2,6-Me 2 ± C 6 H 3 ) 2 SnO] 3 having an almost identical substituent pattern at tin, is likely to originate from the well established dependence of the 2 J( 119 Sn±O± 117 Sn) coupling from the Sn±O±Sn bond angle [27,28] and suggests this angle in compound 1 and in cyclo-[(2,6-Me 2 ±C 6 H 3 ) 2 SnO] 3 to be even more different in solution than in the solid state.…”

Triphenyltin hydroxide as a precursor for the synthesis of nanosized tin‐doped TiO2 photocatalysts

“…38 The chemical shift of the molecules in equilibrium with Ph 3 SnOH (−84.4 ppm) is in the range reported for (Ph 3 Sn) 2 O in other non-coordinating solvents (between −83.1 and −85.5 ppm), 28 -30 while solidstate spectra show two different tin signals, at δ iso ca. −76 and −81 ppm, 35,39 in agreement with the two crystallographically independent tetra-coordinated tin atoms found in the crystal structure determination. 40 When the temperature is lowered to 223 and 198 K (see Table 1 Therefore, reaction (1) does not proceed by direct hydroxide exchange but is the result of reactions (2)-(4) The organotin compounds adsorbed on the surface of amorphous TiO 2 may be changing as the reactions proceed because initially there is a large amount of (Ph 3 Sn) 2 O that later reacts with HCl according to equation (4), while at the end of the reaction, there is a large amount of Ph 3 SnCl.…”

Products of hydrolysis of C,N-chelated triorganotin(IV) chlorides and use of products as catalysts in transesterification reactions

“…3) 119 Sn) = 417 Hz) and directly after the reaction are in 1:1.3 molar ratio, the same ratio was observed by cryoscopic measurements in benzene under argon. The d( 119 Sn) values for 2b and 3b are comparable to the values found for the starting chloride compound (À175.7 ppm) [17], but upfield-shifted in comparison to analogous hexaphenyl distannoxanes (À83.1 to À75.1 ppm) [18,19]. No signal which could be attributed to a OH group was observed in the 1 H NMR spectrum of 2b, which was isolated as a pure product once N(CH 3 [20].…”