ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Due to increasing steric hindrance, the stability of the metal complexes of ethylenediamine-bis-acetylacetone (AeDAA) and the two stereoisomeric forms of 1,2-diaminocyclohexane-bis-acetylacetone (DCAA) decreases in the following series: M(AeDAA) 〉 M(cis-DCAA) 〉 M(trans-DCAA). A CoII-complex can only be prepared with AeDAA; NiII and CuII form complexes with AeDAA and cis-DCAA but not with trans-DCAA and of PdII and PtII complexes could be prepared with all three complexing agents. These facts agree with decreasing stability of the complexes in the metal-series Pt, Pd 〉 Cu 〉 Ni 〉 Co. The apparent stability constant of the complex Cu(AeDAA) has been evaluated. The striking difference in colour between Cu(AeDAA), purple, and Cu(cis-DCAA), green, is explained by the difference in symmetry of the ligand field in the two complexes.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19570400104
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