TY - JOUR
T1 - Synthesis and Structural Systematics of First-Row Transition Metal Complexes with 2-[Bis(benzimidazol-2-ylmethyl)amino]ethanol
AU - Takahashi, Kazuhiro
AU - Nishida, Yuzo
PY - 1987/10/1
Y1 - 1987/10/1
N2 - A nickel(II) complex with (bbimae) (= 2-[bis(benzimidazol-2-ylmethyl)amino]ethanol), [Ni(bbimae)(NCS)2] • H20 (1) and an oxovanadium(IV) complex, [VO(bbimae)(NCS)2] • dma (dma = N,N-dimethylacetamide) (2) have been prepared and their crystal structures determined by X-ray diffraction. Crystal data for 1 at 293 K: a = 13.334(2). b = 17.048(2). c = 10.3829(9) Å, space group P21 21 21 Z = 4. and dcalcd = 1.41 gcm-3. Crystal data for 2 at 293 K: a = 14.099(2). b = 14.998(4), c= 14.051(2) Å, β= 107.634(9)°, space group P21 /c. Z = 4, and dcalcd = 1.36 gem-3. In the nickel(II) complex, (bbimae) functions as a tetradentate ligand, and the geometry around Ni(II) ion is best described as distorted octahedral. The structure is very similar to those of the corresponding Co(II) and Mn(II) complexes. In the case of 2, which is also distorted octahedral, (bbimae) is a tridentate ligand without the coordination of the alcohol group. The M-N (benzimidazole) distances are in the range of 1.95-2.18 Å, and also observed for other first-row transition metal complexes with (bbimae). and differ in the order V(IV) < Mn(II) > Co(II) > Ni(II) > Cu(II), consistent with effective ionic radii of the metal ions. Comparison of the structural parameters of these complexes with those of the metal ions in biological systems has supported the usefullnessof the tripod-like ligands to synthesis model compounds for biological systems.
AB - A nickel(II) complex with (bbimae) (= 2-[bis(benzimidazol-2-ylmethyl)amino]ethanol), [Ni(bbimae)(NCS)2] • H20 (1) and an oxovanadium(IV) complex, [VO(bbimae)(NCS)2] • dma (dma = N,N-dimethylacetamide) (2) have been prepared and their crystal structures determined by X-ray diffraction. Crystal data for 1 at 293 K: a = 13.334(2). b = 17.048(2). c = 10.3829(9) Å, space group P21 21 21 Z = 4. and dcalcd = 1.41 gcm-3. Crystal data for 2 at 293 K: a = 14.099(2). b = 14.998(4), c= 14.051(2) Å, β= 107.634(9)°, space group P21 /c. Z = 4, and dcalcd = 1.36 gem-3. In the nickel(II) complex, (bbimae) functions as a tetradentate ligand, and the geometry around Ni(II) ion is best described as distorted octahedral. The structure is very similar to those of the corresponding Co(II) and Mn(II) complexes. In the case of 2, which is also distorted octahedral, (bbimae) is a tridentate ligand without the coordination of the alcohol group. The M-N (benzimidazole) distances are in the range of 1.95-2.18 Å, and also observed for other first-row transition metal complexes with (bbimae). and differ in the order V(IV) < Mn(II) > Co(II) > Ni(II) > Cu(II), consistent with effective ionic radii of the metal ions. Comparison of the structural parameters of these complexes with those of the metal ions in biological systems has supported the usefullnessof the tripod-like ligands to synthesis model compounds for biological systems.
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U2 - 10.1515/znb-1987-1016
DO - 10.1515/znb-1987-1016
M3 - Article
AN - SCOPUS:33748983878
SN - 0932-0776
VL - 42
SP - 1307
EP - 1314
JO - Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
JF - Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
IS - 10
ER -