SYNTHESIS AND CHARACTERIZATION OF SEVERAL DIACIDOBIS(ETHYLENEDIAMINE)IRIDIUM(III) SALTS

The syntheses and characterizations of cis- and trans-Ir(en)2X+2 (X = Cl, Br, I) (en = ethylenediamine) as well as trans- Ir(en)2XYn+ + (X = Cl, Y = Br, I, H2O, OH, NCS, NO2, ONO; X = Y = NO2, N3) are described, trans-Ir(en)2Cl+2 was prepared by a catalytic method using H3PO2, and the cis isomer was prepared by a method utilizing high ionic strength. The mixed complexes were prepared by a new photochemical method. Proof of structure is based on ir spectra and unequivocable geometric assignments were made by resolution of the cis isomer. The base hydrolyses of both cis- and trans-Ir(en)2Cl+2 go with retention of geometry. © 1969, American Chemical Society. All rights reserved.