title: Remarkable paramagnetically shifted (1)H and (2)H NMR spectra of iron(II) complexes of 2-aza-21-carbaporphyrin: an evidence for agostic interaction.
abstract: Iron(II) 2-aza-21-carbaporphyrins have been characterized by paramagnetically shifted (1)H and (2)H NMR spectra. The high-spin iron(II) complex (HCTPPH)Fe(II)Br displays the beta-H resonances which reflect the combination sigma and pi routes of spin density delocalization. The uniquely large isotropic shift of the inner H(21) hydrogen (812 ppm, 298 K) indicates an Fe(II)-[C(21)-H] agostic interaction.
authors: Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie Street, Wrocław 50 383, Poland.
authors: Krystyna
authors: K
authors: Rachlewicz
authors: Sian-Ling
authors: SL
authors: Wang
authors: Chih-Hsiung
authors: CH
authors: Peng
authors: Chen-Hsiung
authors: CH
authors: Hung
authors: Lechosław
authors: L
authors: Latos-Grazyński