ISSN:
1572-8854
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The crystal structure of three divalent metal complexes withN,N,N′,N′-tetrapropyl-1,2-benzodioxydiacetamide are discussed: (1) (C22H36O4N2)2 Mn·MnBr4,M r =1214.6, tetragonal, space group $$\overline {I4}$$ (No. 82),a=b=13.661(5),c=14.994(4) Å,V=2798.2 Å3,Z=2,d m =1.42,d x =1.44gcm−3,R=0.051 for 660 unique diffractometer data; (2) (C22H36O4N2)2CaBr2,M r =985.0, monoclinic, space groupC2/c (No. 15),a=14.530(4),b=35.565(10),c=12.384(3) Å, β=122.47(2)°,V=5399.2 Å3,Z=4,d x =1.21g cm−3,R=0.056 for 2436 unique diffractometer data; (3) (C22H36O4N2) Ca(NCS)2·solvent,M r =548.8 + solvent, triclinic, space groupP $$\overline 1$$ (No. 2),a=9.341(2),b=13.203(2),c=14.237(2) Å, α=75.69(1),β=78.38(1), γ=76.66(1)°,V=1635.9 Å3,Z=2,d m =1.19,d x (without solvent)=1.11g cm−3,R=0.112 for 3450 unique diffractometer data. Crystals (1) and (2) are 2∶1 complexes with the metal cations at special positions, (1) at a site of local ¯4(S 4 ), and (2) at a site of local 2(C 2 ) symmetry, in both cases coordinated to all eight O atoms of the two ligand molecules. Crystal (1) also contains complex anions MnBr 4 2/s- . Crystal (3) is a 1∶1 complex with a seven-coordination of the Ca2+, involving four O atoms of the ligand molecule, two N atoms from thiocyanate anions, and a solvent molecule.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01195718
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