Structural study of C,N‐chelated monoorganotin(IV) halides

Abstract

Three monoorganotin(IV) compounds of general formula LCNSnX3, where LCN is a 2‐(dimethylaminomethyl)phenyl‐ group and X = Cl (1), Br (2) and I (3), were prepared and characterized using XRD and NMR techniques. Compound 1 reacts with moisture producing [(LCN)2HSnCl2]+ [LCNSnCl4]−. Compound 3 decomposes to (LCN)2SnI2, SnI2 and I2 when heated. Compound 2 was reacted with NH4F yielding an equilibrium of fluorine‐containing species. The major products were [LCNSnF5]2− and [(LCNSnF3)2(µ2‐F)2]2− (4a). When compound 2 was reacted with another fluorinating agent, LCN(n‐Bu)2SnF, an oligomeric product, [LCNSnF2(µ2‐F)2]n, was observed. Further addition of NH4F led to subsequent formation of 4a. The structure of fluorinated products was investigated by 1H, 19F and 119Sn NMR spectroscopy. Copyright © 2006 John Wiley & Sons, Ltd.

Structure and properties of double-C,N-chelated tri- and diorganotin(IV) halides

“…The values of the chemical shifts in the 13 C NMR spectra for 1, 2, 4 and 5 are similar to previously published analogous compounds, 7,12 but the broadening of the signals and the lower solubility of compounds studied means that no additional information about the structure was obtained.…”

“…(3 ,4 )). 13 C NMR: 141.7 (C(1)), broad signal), 141.68 (C(2), broad signal)), 129.1 (C(4), broad signal), 127.9 (C(3), broad signal), 128.2 (C(5), broad signal), 131.7 (C(6), broad signal), 63.3 (C(7), broad signal), 45.5 (C (8) …”

“…The structure of these compounds was studied by diffraction methods (1, 2, 4, 5) and NMR techniques. 13 ). Surprisingly, no trace of 5 was detected.…”

Structure of C, N-chelated nButyltin(IV) fluorides and their use as fluorinating agents of some chlorosilanes, chlorophosphine and metal halides

“…The first method is based on the known fluorination ability of {2-[(CH 3 ) 2 NCH 2 ]C 6 H 4 }nBu 2 SnF (2) [7,8,9,10] and the second one is reaction with dried NH 4 F (excess) in dichloromethane under an argon atmosphere.…”

“…The compounds have five-coordinated tin and are able to fluorinate titanocene dichloride essentialy quantitatively. In our latest reports on this field, we reported the di- [8] and monoorganotin(IV) [9] fluorides having the same ligand. These compounds are presumably tri-or tetranuclear species with rather low solubility in common organic solvents and we used them as a part of selective and sensitive carriers for fluoride ion recognition [10].…”