{'fraction_non_alphanumeric': 0.04335260115606936, 'fraction_numerical': 0.011560693641618497, 'mean_word_length': 5.416666666666667, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Physical organic chemistry of transition metal carbene complexes. 2. Kinetics and mechanism of reactions of [methoxy(phenyl)carbene]pentacarbonylchromium(0) with primary aliphatic amines in aqueous acetonitrile

A kinetic study of the aminolysis of [methoxy(phenyl)carbene]pentacarbonylchromium(O) with five primary aliphatic amines in 20% acetonitril-80% water (v/v) at 25 o C is reported. Second-order rate constants (k A ) increase with amine and OH - concentration, which indicates general base catalysin. Plots of k A vs amine or OH - concentration are curved and level off at high concentration; this implies a change in rate-limiting step and demonstrates that the reaction is stepwise