Schiff-base complexes of calcium: crystal structure analysis of dinitrato[N,N'-propane-1,3-diylbis(salicylideneimine)]calcium(II) and the spectroscopic properties of some related complexes

1979 ◽  
Vol 35 (9) ◽  
pp. 2013-2020 ◽  
Author(s):  
J. I. Bullock ◽  
M. F. C. Ladd ◽  
D. C. Povey ◽  
H.-A. Tajmir-Riahi
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Structure Analysis ◽  
Spectroscopic Properties ◽  
Crystal Structure Analysis ◽  
Schiff Base Complexes

2,5-Diformylbenzene-1,4-diol: A Versatile Building Block for the Synthesis of Ditopic Redox-Active Schiff Base Ligands

2007 ◽  
Vol 62 (1) ◽  
pp. 66-74 ◽  
Author(s):  
Tonia Kretz ◽  
Jan Willem Bats ◽  
Hans-Wolfram Lerner ◽  
Matthias Wagner
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Structure Analysis ◽  
Building Block ◽  
Crystal Structure Analysis ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Starting Compound ◽  
Redox Active

2,5-Diformylbenzene-1,4-diol (5) is a well-suited starting compound for the preparation of ditopic hydroquinone-based ligands. Here, we report an optimized synthesis of 5 which improves the overall yield from published 7% to 42 %. Three new ditopic Schiff base ligands, 2,5-[iPr2N(CH2)2N=CH]2 - 1,4-(OH)2-C6H2 (8), 2,5-(pyCH2N=CH)2-1,4-(OH)2-C6H2 (9), and 2,5-[py(CH2)2N=CH]2-1,4- (OH)2-C6H2 (10), have been synthesized from 5 and structurally characterized by X-ray crystal structure analysis (py = 2-pyridyl).

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