Coordination chemistry of lipoic acid and related compounds.

2002 ◽  
Vol 26 (5) ◽  
pp. 560-566 ◽  
Author(s):  
Michaela Wilhelm ◽  
Rainer Koch ◽  
Henry Strasdeit
Keyword(s):  
Coordination Chemistry ◽  
Lipoic Acid ◽  
Related Compounds

Physicochemical Profiling ofα-Lipoic Acid and Related Compounds

2016 ◽  
Vol 13 (7) ◽  
pp. 861-869
Author(s):  
Arash Mirzahosseini ◽  
András Szilvay ◽  
Béla Noszál
Keyword(s):  
Lipoic Acid ◽  
Related Compounds ◽  
Physicochemical Profiling

scholarly journals Studies on α-Lipoic Acid and its Related Compounds. II

1956 ◽  
Vol 76 (8) ◽  
pp. 943-947 ◽  
Author(s):  
Isamu Nakano ◽  
Mitsuji Sano
Keyword(s):  
Lipoic Acid ◽  
Alpha Lipoic Acid ◽  
Related Compounds

scholarly journals Studies on α-Lipoic Acid and its Related Compounds. VI

1957 ◽  
Vol 77 (7) ◽  
pp. 820-821
Author(s):  
Isamu Nakano ◽  
Mitsuji Sano
Keyword(s):  
Lipoic Acid ◽  
Alpha Lipoic Acid ◽  
Related Compounds

Coordination Chemistry of Lipoic Acid and Related Compounds, Part 1 Syntheses and Crystal Structures of the UV- and Light-Sensitive Lipoato Complexes [M(lip)2(H2O)2] (M = Zn, Cd)

1997 ◽  
Vol 52 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Henry Strasdeit ◽  
Angelika von Döllen ◽  
Anne-Kathrin Duhme
Keyword(s):  
Coordination Chemistry ◽  
Crystal Structures ◽  
Metal Nitrate ◽  
X Ray Diffraction ◽  
Carboxylate Ligands ◽  
X Ray ◽  
Layer Structures ◽  
Network Of Hydrogen Bonds ◽  
Related Compounds ◽  
Nm Range

The rac-lipoato (lip-) complexes [Zn(lip)2(H2O)2] (1) and [Cd(lip)2(H2O)2] (2) were obtained in good yields from solutions of sodium lipoate and the respective metal nitrate in methanol/water. 1 and 2 form pale yellow, moderately light-sensitive crystals.Both compounds were structurally characterized by single-crystal X-ray diffraction. 1: C2/c, a = 39.958(6), b = 5.360(1), c = 10.794(1) Å, β = 95.76(1)°, Z = 4, wR2 = 0.150 (all data). 2: C2/c, a = 38.200(2), b = 5.472(1), c = 11.179(1) Å, β = 92.72(1)°, Z = 4, wR2 = 0.090 (all data). The metal ions are hexacoordinated by the oxygen atoms of two chelating carboxylate ligands and two aqua ligands. The crystal structures are very similar but not isotypic. They are layer structures, in which the complexes within a layer are interconnected by a network of hydrogen bonds. Adjacent layers have contacts via the 1,2-dithiolanyl rings of their lipoato ligands.Crystals of 1 and 2 decompose on exposure to visible light or ultraviolet radiation in the 280-390 nm range. Photopolymerization by formation of intermolecular S-S bonds is very probably involved. Furthermore, the infrared spectra reveal the transformation of COO- into COOH groups

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