Other possible interactions could involve intramolecular hydrogen bonding with the imino nitrogen and a silanol as in VI1 or silicon-oxygen bond formation with the 2-carbon atom of the ring (VIII). In the latter case the intermediate B would result after hydrolysis of the silicon- oxygen-carbon bond. These intermediates resemble those advanced to explain the enhanced rates of hydrolysis for certain a-keto phos-
![2-phenyl-1-[4-[2-[4-(2-phenylacetyl)phenyl]ethyl]phenyl]ethanone Structure](https://image.chemsrc.com/caspic/239/3363-87-9.png)
![2-phenyl-1-[4-(2-phenylacetyl)phenyl]ethanone Structure](https://image.chemsrc.com/caspic/222/3363-92-6.png)
![3-[4-(3-oxo-2,4,5-triphenylcyclopenta-1,4-dien-1-yl)phenyl]-2,4,5-triphenylcyclopenta-2,4-dien-1-one Structure](https://image.chemsrc.com/caspic/239/3432-73-3.png)
