Gradient-Enhanced 2D Multinuclear NMR and X-ray Diffraction Studies of Reaction Products of Dimethyltin(IV) Salicylaldoximate with Chiral Alcohols
✍ Scribed by Abdelkrim Meddour; Abdeslam Bouhdid; Marcel Gielen; Monique Biesemans; Monique Biesemans; Frédéric Mercier; Frédéric Mercier; Edward R. T. Tiekink; Rudolph Willem; Rudolph Willem
- Book ID
- 101278911
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 186 KB
- Volume
- 1998
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
The complex {[(CH 3 ) 2 Sn] 2 [(CH 3 ) 2 SnO](OCH 3 )(HONZO)-coordination mode leads to one seven-coordinate and two five-coordinate tin centers that are linked by a µ 3 -oxo (ONZO)} ( 3) [ONZOH is the oximate residue, o-(-ON=CH-C 6 H 4 -OH), HONZO the corresponding phenolate residue, o-function. The coordination geometries are distorted pentagonal bipyramidal and trigonal bipyramidal, (HON=CH-C 6 H 4 -O-), and ONZO the dibasic species o-(-ON=CH-C 6 H 4 -O-), all derived from salicylaldoxime, o-respectively. The two low-coordinate tin atoms are linked by the alkoxide ion. The corresponding chiral (S)-2-methyl-1-(HON=CH-C 6 H 4 -OH)] reacts with an excess of racemic (d,l)-2-methyl-1-butanol to afford the µ 2 -substitution product 5a butanol reacts analogously to yield 5b. By contrast, reaction of 3 with chiral secondary alcohols (2-butanol or 1-phenyl-1-{[(CH 3 ) 2 Sn] 2 [(CH 3 ) 2 SnO]OCH 2 CH(CH 3 )CH 2 CH 3 -(ONZO)]}. Crystallographic characterisation of the trinuclear ethanol), in various molar ratios, failed to provide the corresponding µ 2 -alkoxy complex. Instead, pure crystals of microcluster 5a shows the presence of the monobasic HONZO ligand in a tridentate µ 2 -O,N mode and of the {[(CH 3 ) 2 Sn] 2 (CH 3 ) 2 SnO(HONZO)(ONZO)} (2a) were isolated. dibasic ONZO ligand in a tridentate O,N,O mode. This