Reactions of the tridentate and tetradentate amine ligands di-(2-picolyl)(N-ethyl)amine and 2,5-bis-(2-pyridylmethyl)-2,5 diazohexane with technetium nitrosyl complexes

摘要

The reaction of the Tc(II) nitrosyl complex (Bu_4N)[Tc(NO)Cl _4] with di-(2-picolyl)(NEt)amine in methanol yields the neutral complex [Tc(NO)Cl(py-N(Et)-py)]. The reaction of the Tc(I) nitrosyl complex [Tc(NO)Cl_2(HOMe)(PPh_3)_2] with this tridentate ligand yields cationic [Tc(NO)Cl(py-N(Et)-py)(PPh_3)]Cl. These two complexes have been structurally characterized. The reaction of [Tc(NO)Cl _2(HOMe)(PPh_3)_2] with the tetradentate ligand 1,4-bis-(2-pyridylmethyl)-1,4-diazobutane yields a mixture of products including cationic [Tc(NO)Cl(py-NH-NH-py)]Cl and cationic [Tc(NO)Cl(PPh _3)(py-NH-NH～py)]Cl, with a pyridyl terminus left dangling.