Details

Autor(en) / Beteiligte

• Elias, Horst
• Grewe, Rüdiger
• Klaehn, Dirk-Detlev
• Paulus, Helmut

Titel

X-Ray Structure of a Nickel(II) Complex of the Tetra-N-methylated Macrocycle Dibenzocyclam with a Folded Ligand Configuration

Ist Teil von

• Zeitschrift für Naturforschung. B, A journal of chemical sciences, 1984-07, Vol.39 (7), p.903-906

Ort / Verlag

Verlag der Zeitschrift für Naturforschung

Erscheinungsjahr

1984

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Under mild conditions nickel(II) nitrate reacts with the macrocyclic N ligand TMBC ( = 1,4 ,8,11-tetramethyl-1,4,8,11-tetraazadibenzo[b,i]cyclotetradecane) to form the light blue-green complex Ni (TMBC) (NO . A three-dimensional X-ray diffraction study shows that the complex crystallizes in the monoclinic space group P2 /c with a = 896.1(3) pm, b = 2059.9(7) pm , c = 1298.6(6) pm, β = 91.37(1)° and Z = 4. The nickel is six-coordinate. The distorted octahedral N arrangement of donor atoms around the nickel is formed by the tetradentate N macrocycle TMBC in an unexpected folded form and by a nitrate ion as a bidentate ligand occupying two depositions. The structure could be refined to the final R-value of 0.045 only by assuming disorder for the second, noncoordinated nitrate ion.