TY - JOUR
T1 - Large Metal Ion-Centered Template Reactions. A Uranyl Complex of Cyclopentakis(2-iminoisoindoline)
AU - Marks, Tobin J.
AU - Wachter, William A.
AU - Day, Victor W.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1975/8/1
Y1 - 1975/8/1
N2 - The reaction of o-dicyanobenzene with anhydrous uranyl chloride does not yield a cyclic, four-subunit phthalocyanine complex. Rather, it yields an expanded, cyclic five-subunit pentakis(2-iminoisoindoline) complex—a “superphthalocyanine”. Dioxocyclopentakis(2-iminoisoindoline)uranium(VI), UO2(N2C8H4)5 crystallizes in the monoclinic space group, P21/c with a = 8.210 (3) Å, b = 21.667 (7) Å, c = 18.462 (5) Å, β = 103.16 (2)°, and Z = 4 (ρcalcd= 1.891, ρobsd= 1.882 g/cm3). Intensity measurements were made for 9564 independent reflections having 2θMo Kα< 60.4° at 20 ± 1° with Nb-filtered Mo Kα radiation on a Syntex P1 autodiffractOmeter. The structure was solved using the heavy atom technique. Cycles of anisotropic full-matrix least-squares refinement have given a final value of 0.054 for the conventional unweighted residual, R, for 4709 independent reflections having I > 3σ(I). The coordination geometry of the uranium atom approximates an idealized compressed pentagonal bipyramid. The two axial ligands are oxygen atoms with an average U-O bond length of 1.744 (8) Å. The equatorial coordination is by five nitrogen atoms (the average U-N bond length is 2.524 (9) Å) of the 20- atom “inner” ring of the 50-atom (excluding hydrogens) macrocycle. The cyclopentakis(2-iminoisoindoline) ligand is severely and irregularly distorted from planarity, presumably as a consequence of appreciable steric strain within the macrocycle.
AB - The reaction of o-dicyanobenzene with anhydrous uranyl chloride does not yield a cyclic, four-subunit phthalocyanine complex. Rather, it yields an expanded, cyclic five-subunit pentakis(2-iminoisoindoline) complex—a “superphthalocyanine”. Dioxocyclopentakis(2-iminoisoindoline)uranium(VI), UO2(N2C8H4)5 crystallizes in the monoclinic space group, P21/c with a = 8.210 (3) Å, b = 21.667 (7) Å, c = 18.462 (5) Å, β = 103.16 (2)°, and Z = 4 (ρcalcd= 1.891, ρobsd= 1.882 g/cm3). Intensity measurements were made for 9564 independent reflections having 2θMo Kα< 60.4° at 20 ± 1° with Nb-filtered Mo Kα radiation on a Syntex P1 autodiffractOmeter. The structure was solved using the heavy atom technique. Cycles of anisotropic full-matrix least-squares refinement have given a final value of 0.054 for the conventional unweighted residual, R, for 4709 independent reflections having I > 3σ(I). The coordination geometry of the uranium atom approximates an idealized compressed pentagonal bipyramid. The two axial ligands are oxygen atoms with an average U-O bond length of 1.744 (8) Å. The equatorial coordination is by five nitrogen atoms (the average U-N bond length is 2.524 (9) Å) of the 20- atom “inner” ring of the 50-atom (excluding hydrogens) macrocycle. The cyclopentakis(2-iminoisoindoline) ligand is severely and irregularly distorted from planarity, presumably as a consequence of appreciable steric strain within the macrocycle.
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U2 - 10.1021/ja00849a012
DO - 10.1021/ja00849a012
M3 - Article
AN - SCOPUS:0001612469
VL - 97
SP - 4519
EP - 4527
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 16
ER -