1. Formation and hydrogen bonding of a novel POSS-trisilanol.
- Author
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Stefan Spirk, Martin Nieger, Ferdinand Belaj, and Rudolf Pietschnig
- Subjects
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COMPLEX compounds synthesis , *HYDROGEN bonding , *INTERMEDIATES (Chemistry) , *X-ray crystallography , *CHEMICAL structure , *CONDENSATION - Abstract
The formation of t-butyl substituted polyhedral silsesquioxanes (POSS) starting from the corresponding silanetriol is reported. Several intermediates involved in this complex condensation process could be identified spectroscopically. In addition, the initial condensation intermediate t-Bu2Si2O(OH)4, as well as t-Bu6Si6O9and t-Bu7Si7O9(OH)3, could be characterized by X-ray crystallography. Owing to the high crystal quality it was possible to experimentally determine the geometric parameters of the unusual cyclic hydrogen bond network in a dimeric POSS trisilanol for the first time. Furthermore, we investigated the structural changes concomitant with dimer formation/dissociation of the t-butyl substituted POSS trisilanol and its methyl analogue. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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