Gas chromatography-mass spectrometric studies were carried out with a DP-1 mass spectrometer system (Du Pont Instruments).Spectroscopy. UV-visible spectra were recorded with a Cary-219 instrument. Emission spectra were obtained with an Aminco-Bowman spectroflurimeter.Acknowledgment. Thanks are due to Dr. J. Brummer for valuable suggestions.
References and Notes(1) (a)
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