Dinicotinic acid

DinlcotinsSure,/. dinicotinic acid, dinitriert, p.a, having two nitro groups introduced, dinitro-. 

A, and the O H -0 length 2.53 A. The 2,6-dicarboxylic acid monohydrate exists in the neutral form, while the 3,5-isomer, dinicotinic acid, exists in the intermediate form, but here each molecule is joined by two kinds of hydrogen bond (O—H- O, 2.59 A O H- -N, 2.52 A) to four surrounding molecules. Pyridine-2,3-dicarboxylic acid exists in the zwitterionic form (38), as does cinchomeronic acid, the 3,4-dicarboxylic isomer (39), the N—H bond distances being 0.89 A and 1.09 A respectively. 

Dinicotinic Acid Dizaide (Dinikotinsaure-diazid in Ger), NC5H3(CO.N3)2 mw 217.15,... 

N 45.16% pltlts (from eth), mp 83°, bp — explodes on rapidly heating was obtd by reaction of the dimethyl ester of dinicotinic acid with hydrazine hydrate and treating the reaction product with K nitrite dil HCl in the cold (Refs 2 3)... 

NOTE No nitro derivs of Dinicotinic Acid were found in Beil nor in CA thru 1966. ... 

Dinicotinic acid and derivs 5 D1380 dinicotinic acid diazide 5 D1380... 

Hexavalent chromium has no known essential function. However, trivalent chromium in the form of a dinicotinic acid-glutathione complex is an essential cofactor for insulin production and forms complexes with protein, amino acids, and other organic acids. 

Derivatives of nicotinic acid which were ineffective for Staph, aureus, Proteus vulgaris and pea roots —pyridine-3,4-dicarboxylic acid (cinchomeronic acid) pyridine-3,5-dicarbo.xylic acid (dinicotinic acid) 3-amino-pyridine trigonelline are-coline. 6-Methyl-nicotinic acid was inactive for dysentery bacilli. Derivatives differing in structure more widely were inactive. 

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