163773-39-5Relevant academic research and scientific papers
Synthesis and structures of the mononuclear iron(II) dialkyl FeR2 and the iron(II) dithiolate complex tBu3C6H2>
Lee, Hung Kay,Luo, Bao-Sheng,Mak, Thomas C. W.,Leung, Wing-Por
, p. C71 - C73 (1995)
The thermally stable iron(II) dialkyl, 1 was obtained in good yield from 2 and FeCl2.Reaction of 1 with ArSH yielded the novel neutral mononuclear iron(II) dithiolate complex 2.An X-ray diffraction study revealed that the alkyl ligands in 1 are bonded to the metal center in a chelating manner, whereas in 2 one alkyl ligand has been converted into a neutral alkane species by ArSH, but remains coordinated to the iron(II) center via its pyridyl nitrogen atom.Keywords: Iron; Thiolate; Pyridine; Silicon; Crystal structure
Synthesis and structures of iron(II) alkyl and thiolate compounds containing sterically hindered N-functionalized alkyl ligands
Leung, Wing-Por,Lee, Hung Kay,Weng, Lin-Hong,Luo, Bao-Sheng,Zhou, Zhong-Yuan,Mak, Thomas C. W.
, p. 1785 - 1792 (2008/10/09)
Iron(II) dialkyl compounds [FeR2] (R = C(SiMe3)2C5H4N-2 (1), C(Ph)(SiMe3)C5H4N-2 (2), CH(SiMe3)C9H6N-8 (4)) and [{Fe(CHSitBuMe2C5H4N-2) 2}2] (3) have been prepared from the reaction of FeCl2 with the appropriate N-functionalized alkyllithium reagent in a 1:2 molar ratio. The monoalkylated iron(II) complex [Fe{CPhSiMe3C5H4N-2}(Cl)(TMEDA)] (5) has been prepared by treating FeCl2 with a stoichiometric amount of the organolithium reagent. X-ray analysis revealed that the alkyl ligands are bonded to the metal centers in a chelating manner in the mononuclear compounds 1 and 5, whereas in 3 one of the alkyl ligands forms an interligand bridge betwen the two iron centers. Compounds 1, 2, 4, and 5 have magnetic moments in the range 4.24-4.96 μB that are characteristic of a high-spin d6 electronic configuration with four unpaired electrons. The magnetic moment of the binuclear compound 3 is 2.92 μB per iron atom, apparently a consequence of antiferromagnetic coupling between the two metal centers. Subsequent reaction of 1 with ArMeOH (ArMe = 2,6-t Bu2-4-MeC6H2) and ArSH (Ar = 2,4,6-tBu3C6H2) gave the neutral monomeric iron(II) bis(aryloxide) [Fe-(OArMe)2{CH(SiMe3)2C 5H4N-2}] (6) and dithiolate [Fe(SAr)2{CH(SiMe3)2C5H 4N-2}] (7), respectively. Both of the latter compounds have a rare coordination number of 3 at the iron(II) center. The magnetic moment of 5.11 μB for 7 indicates a high-spin configuration with four unpaired electrons on the iron(II) center. Electrochemical studies on the compoounds are also reported.
