Reactions involving Fe(NO)2(CO)2 with a series of phenanthroline derivatives were investigated and their products were characterized using IR, NMR, X-ray, UV/vis, CV and EPR. Infrared spectroscopy showed NO shifts of 1684 and 1607 cm-1, 1687 and 1632 cm-1, and 1675 and 1626 cm-1, for products 1, 2 and 3, respectively. X-ray crystal data revealed that all three complexes were of the attracto conformation with the nitric oxide, N-Fe-N, angles of <130°. UV/vis data showed molar absorptivity of 22,551, 33,174 and 38,407 L/mol*cm, for products 1, 2 and 3, respectively. The molar absorptivity for the peak in the visible region for product 2 spectrum was 2,923 L/mol*cm. Cyclic voltammetry studies for products 1 and 3 showed one-electron quasi-reversible reductions while product 2 showed a quasi-reversible oxidations with E1/2 values at -0.312, 0.431 and -0.330 V and the cathode and anode separations (E) of 0.237, 0.100 and 0.066 V, for products 1, 2 and 3, respectively. The EPR spectra showed that products 1, 2, and 3 have the characteristic DNIC peak at g-values of 2.023, 2.017 and 2.022, respectively. Product 3 had an additional peak at g-value of 1.916.
|Commitee:||Bu, Xianhui, Tian, Fangyuan|
|School:||California State University, Long Beach|
|Department:||Chemistry and Biochemistry|
|School Location:||United States -- California|
|Source:||MAI 81/1(E), Masters Abstracts International|
|Keywords:||complexes, DNICs, nitric oxide, phenanthroline|
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