β-Donor Interactions as Secondary Bonds in Dichlorobis(dimethylaminoxy)silane and -germane
✍ Scribed by Norbert W. Mitzel; Udo Losehand
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 107 KB
- Volume
- 1998
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
The compounds Cl 2 Si(ONMe 2 ) 2 and Cl 2 Ge(ONMe 2 ) 2 were by the small angles SiON [102.8(1) and 103.7(1)°] and GeON [102.0(1)°], and the distances Si•••N (2.438 and 2.450 A ˚) and prepared by the reaction of the appropriate tetrachlorides with N,N-dimethylhydroxylamine in the presence of 2,6-Ge•••N (2.519 and 2.520 A ˚). The conformation is anti-gauche in both compounds (one O-Si-O-N torsion angle being about lutidine as an auxiliary base. The compounds were obtained as crystalline solids and characterised by elemental analysis, 180°, the other 60°), but the strength of the β-donor interaction is not significantly affected by the different anti-IR and NMR spectroscopy (nuclei 1 H, 13 C, 15 N, 17 O, and 29 Si). Their molecular structures were determined by single-crystal substituents at the nitrogen centres, although such behaviour was expected from earlier studies carried out on X-ray diffraction. The compounds are isostructural and both show the presence of weak secondary bonds between the ClH 2 SiONMe 2 . The β-donor interactions are also weaker than those found in ClH 2 SiONMe 2 . nitrogen and silicon centres (β-donor bonds), as is indicated