1. The acetyl group in C6H5COCH3Cr(CO)2P(C6H5)3 and the protonated dimethylamino group in\((CH_3 )_2 \mathop N\limits^ \oplus HC_6 H_5 Cr(CO)_3 \mathop X\limits^ \ominus\) increase the rate of the reaction of isotopic exchange of hydrogen in acid media in comparison with the corresponding unsubstituted compounds. 2. (CH3)2NC6H5Cr(CO)3 and (CH3)2NC6H5Cr(CO)2P(C6H5)3 undergo a reaction of protodeamination in acid media.
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