{'fraction_non_alphanumeric': 0.06752789195537287, 'fraction_numerical': 0.02524955960070464, 'mean_word_length': 6.189873417721519, '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}}
Efficient Photodissociation of Anions from Benzoyl-Functionalized Ferrocene Complexes.

Spectroscopic and photochemical studies of several benzoyl-functionalized ferrocene complexes in nonaqueous solvents are reported. Bands observed above 300 nm in the electronic absorption spectrum of the unsubstituted complex, Fe(eta(5)-C(5)H(5))(2), and assigned to ligand field transitions shift to longer wavelengths and intensify upon introduction of a benzoyl group into one or both cyclopentadienide rings. Such behavior suggests that these transitions have acquired some charge-transfer character. Visible-light (546 nm) irradiation of 1,1'-dibenzoylferrocene, III, dissolved in CH(3)CN, CH(3)OH, or ethyl alpha-cyanopropionate causes ring-metal cleavage to produce the benzoylcyclopentadienide ion, C(6)H(5)C(O)C(5)H(4)(-), and the corresponding half-sandwich cationic complex, Fe[(eta(5)-C(5)H(4))C(O)C(6)H(5)](S)(3)(+) (S is solvent). The disappearance quantum yield, phi(dis), for III is 0.45 in CH(3)OH and 0.28 in ethyl alpha-cyanopropionate and is unaffected by the presence of dissolved O(2), added H(2)O (10 000 ppm), or added methanesulfonic acid (30 ppm). 1,1'-Dibenzoylferrocenes containing substitutents on both phenyl rings undergo photoinduced ring-metal cleavage in CH(3)OH with phi(dis) values very similar to that of III, while monobenzoylferrocenes are appreciably less photoreactive. A mechanism that accommodates the photochemical behavior of benzoyl-functionalized ferrocene complexes is discussed. In addition, a previous suggestion concerning the role of III in the photoinitiated anionic polymerization of an alpha-cyanoacrylate monomer is reconsidered in light of the present study.