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Syntheses and Crystal Structures of Bis‐Citrato, Bis‐Citramalato and Bis‐Malato Germana...
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Syntheses and Crystal Structures of Bis‐Citrato, Bis‐Citramalato and Bis‐Malato Germanate(IV) Complexes
作者:
Hung‐Cheh Chiang,
Kao‐Chu Yang,
Chuen‐Her Ueng,
期刊:
Journal of the Chinese Chemical Society
(WILEY Available online 1994)
卷期:
Volume 41,
issue 1
页码: 59-63
ISSN:0009-4536
年代: 1994
DOI:10.1002/jccs.199400007
出版商: WILEY‐VCH Verlag
关键词: Synthesis;Crystal structure;Bis‐citrato, bis‐citramalato and bis‐malato germanate(IV) complexes
数据来源: WILEY
摘要:
AbstractBis‐citrato1a‐d, bis‐citramalato2and bis‐malato3germanate(IV) complexes were synthesized from germanium dioxide and citric acid, citramalic acid and malic acid respectively and were identified with IR, NMR and elementary analysis. Crystal 1a is triclinic, space group P1 with a = 7.919(2), b = 7.968(3), c = 9.605(3) Å, α = 94.25(3), β = 108.03(2), γ= 113.05(3)°, Z = 1, and the final residue, R(F), is 0.033 for 2583 reflections. Crystal 2 is monoclinic, space group C2 with a = 10.226(4), b = 12.802(4), c = 6.141(1) Å, β = 100.75(2)°, Z = 2, and the final residue, R(F), is 0.034 for 934 reflections. Both1aand2have slightly distorted octahedral structures with citrate or citramalate ions as a tridentate ligand that forms five‐, six‐ and seven‐membered rings with the central metal. There is a two‐fold axis through the central atom of compound2instead of the inversion center of1a. Same structures for these six complexes are indicated because the spectral patterns of the other four compounds,1b‐dand3, are similar to
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