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The complexes (E)- and (Z)-Fe(eta5-C5H4CHO) (eta5-C5H4CH=CH-C6 H4-4-NO2) [2-(E) and 2-(Z), respectively], (E)- and (Z)-Fe (eta5-C5H4CHO) (eta5-C5H4CH=CH-C6 H4-4-CN) [3-(E) and 3-(Z), respectively], (E,E)-, (E,Z)-, and (Z,Z)-Fe(eta5-C5H4CH=CHC6 H4-4-NO2)2 [4-(E,E), 4-(E,Z), and 4-(Z,Z), respectively], (E,E)-, (E,Z)-, and (Z,Z)-Fe(eta5-C5H4CH=CHC6 H4-4-CN)2 [5-(E,E), 5-(E,Z), and 5-(Z,Z), respectively], and Fe(eta5-C5H5) (eta5-C5H4-(E)-CH=CH-4-{ (eta6H4Cr(CO)3}- (E)-CH=CH-eta5-C5H4)Fe (eta5-C5H5) (7) have been synthesized. Structural studies on 2-(E), 4-(E,Z), 5-(E,E), Fe(eta5-C5H5) {eta5-C5H4- (E)-CH=CH-4-C6H4- (E)-CH=CH-eta5-C5H4}Fe (eta5-C5H5) (6) and 7 have been performed. Electrochemical studies of 2-5 reveal trends in the oxidation potentials which are consistent with the more effective conjugation of the (E) isomers, and the better electron-accepting character of NO2 than CN and of CHO than H. Powder SHG measurements by the Kurtz technique using fs pulses at the telecommunications wavelength of 1.3 mum reveal low responses for 4-(E,E), 5-(E,E), and 7. Third-order NLO measurements by Z-scan using fs pulses at 800 nm suggest an increase in [lambda] on increasing the electron-acceptor strength [when proceeding from 5-(E,Z) to 4-(E,Z), CN is replaced by NO2], and on introduction of the Cr(CO)3 unit, when proceeding from 6 to 7.
The prevalence of solvent effects in heterogeneous catalysis in condensed media has motivated developing theoretical assessments of solvent structures and their interactions with reaction intermediates and transition states. Electric Literature of 1271-48-3, You can get involved in discussing the latest developments in this exciting area about 1271-48-3
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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion