Double-C,N-chelated tri- and diorganotin(IV) fluorides

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

“…In this mixture, four different species were observed. Based on our previous study 35 and 119 Sn and 19 F NMR spectra of the mixture, we identified two of the compounds as 4a (for proposed structures see Fig. 1 (6), as the product of fluorine for bromine atom metathetical exchange, was identified as the tolueneonly soluble product, which indicates a high conversion of 2 to a fluoride-containing species.…”

“…Toluene, benzene, n-hexane and n-pentane were dried over and distilled from sodium/potassium alloy, degassed and stored over a potassium mirror. Chloroform and dichloromethane were dried over and distilled from P 2 35,36 were prepared using published methods.…”

Solid‐State Structure and Behaviour in Solution of Hypervalent Organotin(IV) Derivatives Containing 2‐(Me2NCH2)C6H4 Moieties

“…All [2-(Me 2 NCH 2 )C 6 H 4 ] 2 SnX 2 (X = F, Cl, Br, I) are monomeric, with hypervalent octahedral cis-X 2 -cis-N 2 -trans-C 2 configurations (Scheme 1, A). [4][5][6][7] In contrast, the related [Me 2 N(CH 2 1, B). [10,12] The use of an organic ligand with a potential for only one intramolecular NǞSn interaction resulted in trigonal bipyramidal (C,N,C)SnX 2 configurations, e.g.…”

“…in RN(CH 2 CH 2 CH 2 ) 2 SnCl 2 (Scheme 1, C). [8,11] Very few mixed diorganotin(IV) dihalides containing only one organic ligand that can act as a (C,N)-chelate moiety have been described so far: RMeSnX 2 (X = Cl, Br), [2] RBuSnCl 2 , [13,14] RPhSnX 2 (X = F, [5] Cl [4,15] ) [R = 2-(Me 2 NCH 2 )C 6 H 4 ] and [2-(Me 2 NCHMe)C 6 H 4 ]MeSnBr 2 . [2] They were mainly characterized by solution NMR spectroscopy.…”

“…Only when [2-(Me 2 NCHMe)-C 6 H 4 ]Bu 2 SnF was used as a fluorination agent, was a sparingly soluble product obtained, for which a trimeric structure, (RPhSnF 2 ) 3 , was proposed on the basis of ESI-MS spectra. [5] So far, the molecular structure for only [2-(Me 2 NCH 2 )C 6 H 4 ]PhSnCl 2 has been established by singlecrystal X-ray diffraction; it features the expected trigonal bipyramidal (C,N)CSnX 2 configuration (Scheme 1, D). [4,15] The molecular structures of the related compounds [2,6-(Me 2 NCH 2 ) 2 C 6 H 3 ](4-MeC 6 H 4 )SnI 2 , [9] [2,6-(Me 2 NCH 2 ) 2 -C 6 H 3 ]PhSnCl 2 [16] and [2,6-(Me 2 NCH 2 ) 2 C 6 H 3 ]BuSnCl 2 [17] feature an all-trans-(N,C,N)CSnX 2 configuration due to the "pincer" pattern of the aryl group bearing two pendant arms.…”