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

Abstract

Tri-and di-organotin(IV) compounds containing one or two 2-(dimethylaminomethyl)phenyl-(L

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

“…On the other hand, when 1 was slowly crystallized from a hexane-dichloromethane mixture in air, only single crystals of 1a and SnO 2 powder were obtained. (as a products of phenyl group migration), 32,33 producing with moisture SnO 2 and HCl, and crystallizing as described below (Fig. 4).…”

S,N‐Chelated organotin(IV) compounds containing 6‐phenylpyridazine‐3‐thiolate ligand—structural, antibacterial and antifungal study

“…This deduction is based on the known 119 Sn NMR chemical shift values of similar diorganotin(IV) compounds [for example L CN (n-Bu)Sn(OCOCF 3 ) 2 , δ( 119 Sn) = −282.8 ppm; [29] (L CN ) 2 SnCl 2 , δ( 119 Sn) = −252.8 ppm; (L CN ) 2 SnBr 2 , δ( 119 Sn) = −271.2 ppm], prepared by us where the tin atom is actually six-coordinated too. [30] Based on this fact we presume the dynamic bonding fashion of both L SN moieties (e.g. fast equilibrium between monodentately and bidentately bonded L SN ligands), which is undetectable on the relatively slow NMR time scale.…”

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.…”

“…[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. A similar structure was proposed on the basis of detailed NMR spectroscopic studies for [2,6-(Me 2 NCH 2 ) 2 -C 6 H 3 ]BuSnBr 2 .…”