Unusual reactions of [{mu-(phthalazine-N-2 : N-3)}Fe-2(mu-CO)(CO)(6)] with organolithium reagents. A novel coordination mode of 1,2-diazane diiron carbonyl compounds

摘要

[{mu-(Phthalazine-N-2:N-3)}Fe-2(mu-CO)(CO)(6)] (1) reacts with organolithium reagents, RLi (R = CH3, C6H5, p-CH3C6H4, p-CH3OC6H4, p-CF3C6H4, p-C6H5C6H4), followed by treatment with Me3SiCl to give the novel diiron carbonyl complexes with a saturated N-N six-membered diazane ring ligand, [{C6H4CH(R)NNCH2}Fe-2(C=O)(CO)(6)] (2, R = CH3; 3, R = C6H5; 4, R = p-CH3C6H4; 5, R = p-CH3OC6H4; 6, R = p-CF3C6H4; 7, R = p-C6H5C6H4). Compounds 4 and 5 were treated with [(NH4)(2)Ce(NO3)(6)] to afford the aryl-substituted phthalazine-coordinated diiron carbonyl compounds [(mu-{1-(p-CH3C6H4)-phthalazine-N-2:N-3})Fe-2(mu-CO)(CO)(6)](8) and [(mu-{1-(p-CH3OC6H4)-phthalazine-N-2:N-3})Fe-2(mu-CO)(CO)(6)] (9), respectively. The structures of complexes 4 and 9 have been established by X-ray diffraction studies.