Crystal and molecular structures of tris (p‐methoxyphenyl)‐ and tris(2,4, 6‐trimethylphenyl)tin(IV) acetates

Abstract

The crystal and molecular structures of tris(panisyl)tin acetate (1) (p-anisyl =p-methoxyphenyl) and trimesityltin acetate (2) (mesityl= 2,4,64rimethylphenyI) have been determined. Both have monomeric structures with the acetate group acting as an asymmetric bidentate ligand. Bond valence analysis of (1) and (2) and other Ph,Sn02CR suggest however that the carboxylate ligand effectively occupies a single bonding position at tin. Thus in (1) and (2) the tin atom is in a chemical environment equivalent to that found in four-coordinate R,Sn-X systems based on tetrahedral geometry.

Crystal structure of trimesityltin(IV)benzoate, (C27H33)3Sn(O2CC6H5)

“…The range of angles subtended at Sn is 97.8(3)° to 120.7(4)°, with the widest angle ascribed to the close approach of the 02 atom. The observed structure is in essential agreement with the acetate analog [1]. The structural chemistry of the triorganotin carboxylates has been reviewed and is known to have a wide variety of structures, including monomelic, to oligomeric and polymeric motifs [2].…”

Chlorotris(m-methoxyphenyl)tin(IV)

“…• .CI' columns along the crystal threefold axes, as in the two previously reported meta-substituted Ar3SnC1 structures (A) and (B) (Wharf & Simard, 1996). The resuiting columns of molecules then interlock like 'cogs in gears'.…”

“…We have shown recently that [SnCI(m-CH3C6H4)3], (A), and [SnCl{3,5-(CH3)2C6H4}31, (B), have very symmetrical trigonal crystal and molecular structures (Wharf & Simard, 1996), unlike practically all other Ar3SnX structures, which usually crystallize in one of the ubiquitous monoclinic space groups (P21/a, P21/c or P21/n), with distorted trigonal molecular geometries, although with Ar = p-CH3S(O2)C6H4-and X = C1, space group Pna21 is adopted (Wharf, Lebuis & Lamparski, 1996). Since increasing substituent size causes greater steric distortions in Ar4Sn systems, the crystal structure of the title compound, (1), was determined in order to assess the effect of the same trend on meta-substituted Al'3 SnX structures.…”

Studies in aryltin chemistry: part 7. Spectroscopic and fungicidal studies of somep-substituted tri-aryltin acetates, oxides and hydroxides

“…18 The phenyltin analogues were obtained by standard procedures, 19,20 and tris (p-methoxyphenyltin acetate has already been reported. 21 Analytical and spectroscopic data are given in Table 1 for all compounds prepared in this work.…”