title: Nitrosyl and carbene iron complexes bearing a κ(3)-SNS thioamide pincer type ligand.
abstract: The previously reported monochelate iron complex with κ(3) SNS thioamide pincer ligand, 2,6-bis(N-2,6-bis(diphenylmethyl)-4-isopropylphenyliminothiolate)pyridine (L(DPM)), [Fe(THF)2(κ(3)-L(DPM))], gave novel complexes, [Fe(NHC)(κ(3)-L(DPM))] and [Fe(NO)2(κ(3)-L(DPM))], by substitution reactions with N-heterocyclic carbene (NHC) and NO molecules, respectively. The X-ray crystal structure of the [Fe(NHC)(κ(3)-L(DPM))] complex revealed a unique square planar iron(ii) complex, which was determined to be in an intermediate spin state (S = 1) in benzene from the Evans method. The [Fe(NO)2(κ(3)-L(DPM))] complex was determined to have a trigonal bipyramidal geometry from X-ray analysis and was indicated to be diamagnetic from the (1)H NMR spectrum. The ν(NO) stretching vibration of this complex showed two peaks at 1840 cm(-1) and 1790 cm(-1), and also the Fe-N-O bond angles were 168.9(2)° and 168.03(19)°. These findings suggest that the two coordinated NO molecules have neutral radical character, and they are antiferromagnetically coupled with the high-spin iron center.
authors.affiliation: Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan. masuda.hideki@nitech.ac.jp.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Suzuki
authors.forename: Jun
authors.initials: J
authors.lastname: Matsumoto
authors.forename: Yuji
authors.initials: Y
authors.lastname: Kajita
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Inomata
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Ozawa
authors.forename: Hideki
authors.initials: H
authors.lastname: Masuda