856161-87-0Relevant academic research and scientific papers
Synthesis and structural characterization of three-coordinate Mn II, FeII, and ZnII complexes containing a bulky diamide ligand [DippN(CH2)3NDipp]2- (Dipp = 2,6-iPr2C6H3)
Chai, Jianfang,Zhu, Hongping,Ma, Qingjun,Roesky, Herbert W.,Schmidt, Hans-Georg,Noltemeyer, Mathias
, p. 4807 - 4811 (2004)
The reaction of DippNH(CH2)3NHDipp (1) (Dipp = 2,6-iPr2C6H3) with 2 equiv. of MeLi in diethyl ether resulted in the formation of the monomeric dilithium salt [(Dipp)N(CH 2)3N(Dipp)][Li(OEt2)]2 (2) in high yield. Further reactions of 2 with MnCl2, FeCl2, and ZnCl2, respectively, afforded the complexes [M2{N(Dipp) (CH2)3N(Dipp)}2] [M = Mn (3), Fe (4), Zn (5)] with three-coordinate metal centers. Complexes 2-5 were characterized by X-ray structural analysis. The complexes contain a nonplanar MNMN central core. The diamide ligand in complexes 3-5 displays a boat conformation and is both chelating and bridging, so that one of the nitrogen atoms is three-coordinate and the other four-coordinate. Complexes 3-5 are the first examples with diamide ligands in such a bonding mode. The magnetic investigations of compounds 3 and 4 reveal an antiferromagnetic exchange between the metal atoms. ( Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004).
