Structural studies of diorganotin(IV) sulphonates The crystal structures of [(n-C4H9)2Sn{μ-OSO2C6H2(CH3)3}2]n and its partially hydrolyzed product [(n-C4H9)2Sn{(μ-OH)(μ-OSO2C6H2(CH3)3)}]n

Self Cite

A number of alkyltin(IV) paratoluenesulfonates, R n Sn(OSO 2 C 6 H 4 CH 3 -4) 4−n (n = 2, 3; R = C 2 H 5 , n-C 3 H 7 , n-C 4 H 9 ), have been prepared and IR spectra and solution NMR ( 1 H, 13 C, 119 Sn) are reported for these compounds, including (n-C 4 H 9 ) 2 Sn(OSO 2 X) 2 (X = CH 3 and CF 3 ), the NMR spectra of which have not been reported previously. From the chemical shift δ( 119 Sn) and the coupling constants 1 J( 13 C, 119 Sn) and 2 J( 1 H, 119 Sn), the coordination of the tin atom and the geometry of its coordination sphere in solutions of these compounds is suggested. IR spectra of the compounds are very similar to that observed for the paratoluenesulfonate anion in its sodium salt. The studies indicate that diorganotin(IV) paratoluenesulfonates, and the previously reported compounds (n-C 4 H 9 ) 2 Sn(OSO 2 X) 2 (X = CH 3 and CF 3 ), contain bridging SO 3 X groups that yield polymeric structures with hexacoordination around tin and contain non-linear C-Sn-C bonds. In triorganotin(IV) sulfonates, pentacoordination for tin with a planar SnC 3 skeleton and bidentate bridging paratoluenesulfonate anionic groups are suggested by IR and NMR spectral studies. The X-ray structure shows [(n-C 4 H 9 ) 2 Sn(OSO 2 C 6 H 4 CH 3 -4) 2 ·2H 2 O] to be monomeric containing sixcoordinate tin and crystallizes from methanol-chloroform in monoclinic space group C2/c. The Sn-O (paratoluenesulfonate) bond distance (2.26(2)Å) is indicative of a relatively high degree of ionic character in the metal-anion bonds.

Section: O (4)]supporting

confidence: 85%

Section: O (4)]mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The synthesis, NMR (¹H, ¹³C, ¹¹⁹Sn) and IR spectral studies of some di‐ and tri‐organotin(IV) sulfonates: X‐ray crystal structure of [(n‐C₄H₉)₂Sn(OSO₂C₆H₄CH₃‐4)₂·2H₂O]

Kapoor¹,

Gupta²,

Kapoor³

et al. 2003

Self Cite

“…In an unusual example, the reaction of (Ph 3 Sn) 2 O with R f CO 2 H leads to an Sn-C bond cleavage and the isolation of [Ph 2 Sn(µ-OH)O 2 CR f ] 2 (Table 1, entry 24). 32 The crucial role of R f CO 2 H in determining the course of the reaction can be gauged by the fact that the reaction of (Ph 3 Sn) 2 41 However, in this case, the coordination polymer is one-dimensional where two sulfonate ligands are involved in bridging adjacent distannoxanes units.…”

Section: Bonding Parametersmentioning

confidence: 99%

Organotin compounds containing four‐membered distannoxane [Sn(µ‐OH)]₂ units

Chandrasekhar

Singh

Gopal

2007

Synthesis and characterization of di‐n‐butyltin(IV) complexes with 4′/2′‐nitrobiphenyl‐2‐carboxylic acids: X‐ray crystal structures of [{(n‐C₄H₉)₂Sn(OCOC₁₂H₈NO₂−4′)}₂O]₂ and (n‐C₄H₉)₂Sn{OCOC₁₂H₈NO₂−4′}₂

Kapoor

Gupta

Kapoor

et al. 2003

Self Cite

. These compounds were characterized by elemental analysis, IR and NMR ( 1 H, 13 C and 119 Sn) spectroscopy. The IR spectra of these compounds indicate the presence of anisobidentate carboxylate groups and non-linear C-Sn-C bonds. From the chemical shifts δ ( 119 Sn) and the coupling constants 1 J( 13 C, 119 Sn), the coordination number of the tin atom and the geometry of its coordination sphere have been suggested. [{(n-C 4 H 9 ) 2 Sn(OCOC 12 H 8 NO 2 -4 )} 2 O] 2 (1) exhibits a dimeric structure containing distannoxane units with two types of tin atom with essentially identical geometry. To a first approximation, the tin atoms appear to be pentacoordinated with distorted trigonal bipyramidal geometry. However, each type of tin atom is further subjected to a sixth weaker interaction and may be described as having a capped trigonal bipyramidal structure. The diffraction study of the complex (n-C 4 H 9 ) 2 Sn(OCOC 12 H 8 NO 2 -4 ) 2 (3) shows a six-coordinate tin in a distorted octahedral frame containing bidentate asymmetric chelating carboxylate groups, with the n-Bu groups trans to each other. The n-Bu-Sn-n-Bu angle is 152.8 • and the Sn-O distances are 2.108(4) and 2.493(5)Å. The oxygen atom of the nitro group of the ligand does not participate in bonding to the tin atom in 1 and 3. Crystals of 1 are triclinic with space group P1 and of that of 3 have orthorhombic space group Pnna.