TY - JOUR
T1 - The structures and magnetism of trinuclear Ni(II), Co(II) and Mn(II) complexes derived from unsymmetrical compartmental ligands
AU - Adams, Harry
AU - Fenton, David E.
AU - Cummings, Laura R.
AU - McHugh, Paul E.
AU - Ohba, Masaaki
AU - Okawa, Hisashi
AU - Sakiyama, Hiroshi
AU - Shiga, Takuya
PY - 2004/9/10
Y1 - 2004/9/10
N2 - Trinuclear Ni(II), Co(II) and Mn(II) complexes have been prepared from the asymmetric compartmental proligands 2-alkyliminomethyl-4-methyl-6-{[methyl-(2- pyridin-2-yl-ethyl)-amino]-methyl}-phenol(alkyl=ethyl, n-propyl and n-butyl) and 2-[(2-methoxy-ethylimino)-methyl]-4-methyl-6-{[methyl-(2-pyridin-2-yl-ethyl)- amino]-methyl}-phenol, which provide adjacent tridentate N2O and bidentate NO donor sets. The crystal structures of [Ni3(L 6)2(OAc)2(NCS)2]·CH 3OH·H2O, [Co3(L4) 2(OAc)2(NCS)2], and [Mn3(L 7)2(OAc)2(NCS)2]·CH 3OH·H2O were determined and show that the metals provide an isosceles triangle with M1-M2=M 1-M3≈3.2 Å and M2-M3≈5.0 Å. The cryomagnetic properties of the complexes have been studied and indicate a weak antiferromagnetic interaction between the adjacent, M 1M2 and M1M3 ions with little magnetic interaction between the terminal M2M3 ions.
AB - Trinuclear Ni(II), Co(II) and Mn(II) complexes have been prepared from the asymmetric compartmental proligands 2-alkyliminomethyl-4-methyl-6-{[methyl-(2- pyridin-2-yl-ethyl)-amino]-methyl}-phenol(alkyl=ethyl, n-propyl and n-butyl) and 2-[(2-methoxy-ethylimino)-methyl]-4-methyl-6-{[methyl-(2-pyridin-2-yl-ethyl)- amino]-methyl}-phenol, which provide adjacent tridentate N2O and bidentate NO donor sets. The crystal structures of [Ni3(L 6)2(OAc)2(NCS)2]·CH 3OH·H2O, [Co3(L4) 2(OAc)2(NCS)2], and [Mn3(L 7)2(OAc)2(NCS)2]·CH 3OH·H2O were determined and show that the metals provide an isosceles triangle with M1-M2=M 1-M3≈3.2 Å and M2-M3≈5.0 Å. The cryomagnetic properties of the complexes have been studied and indicate a weak antiferromagnetic interaction between the adjacent, M 1M2 and M1M3 ions with little magnetic interaction between the terminal M2M3 ions.
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U2 - 10.1016/j.ica.2004.03.055
DO - 10.1016/j.ica.2004.03.055
M3 - Article
AN - SCOPUS:4444257435
SN - 0020-1693
VL - 357
SP - 3648
EP - 3656
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 12
ER -