화학공학소재연구정보센터
Inorganic Chemistry, Vol.53, No.10, 5100-5108, 2014
Aluminum-Stabilized Low-Spin Iron(II) Hydrido Complexes of 1,4,7-Trimethyl-1,4,7-triazacyclononane
We investigated herein the reactions of (Me(3)tacn)FeCIn (1a: n = 3, 1b: n = 2) with common aluminum hydride reagents and a bulky dihydridoaluminate {Li(ether)(2)}{Al(OC6H3-2,6-Bu-t(2))}(mu-H)(2), which yielded the diamagnetic hydrido complexes 2-4 containing Fe(II) and Al(III). In particular, the use of divalent 1b afforded excellent isolated yields. The structures of 2-4 were determined using spectroscopic and crystallographic analyses. The crystal structures showed distorted octahedral Fe centers and fairly short Fe-Al distances [2.19-2.24 angstrom]. The structures of cation moiety 2 and neutral complex 4 were further probed using DFT calculations, which indicated a stable low-spin Fe(II) state and strongly electron-donating nature of the (Me(3)tacn)FeH3 fragment toward the Al(III) center.