u2014 ch 3 u2014 nh ch 3 u2014 n ch 3 2 u2014 cn and halides in certain embodiments the at least bidentate organic compound may be an aliphatic or aromatic acyclic or cyclic hydrocarbon which has from 1 to 18 carbon atoms and in addition has exclusively at least two carboxy groups as functional groups for the purposes of the present disclosure mention may be made by way of example of dicarboxylic acids as may be used to realize any of the embodiments disclosed herein such as oxalic acid succinic acid tartaric acid 1 4 butanedicarboxylic acid 1 4 butene dicarboxylic acid 4 oxopyran 2 6 dicarboxylic acid 1 6 hexanedicarboxylic acid decanedicarboxylic acid 1 8 heptadecanedicarboxylic acid 1 9 heptadecanedicarboxylic acid heptadecanedicarboxylic acid acetylenedicarboxylic acid 1 2 benzenedicarboxylic acid 1 3 benzenedicarboxylic acid 2 3 pyridinedicarboxylic acid pyridine 2 3 dicarboxylic acid 1 3 butadiene 1 4 dicarboxylic acid 1 4 benzenedicarboxylic acid p benzenedicarboxylic acid imidazole 2 4 dicarboxyolic acid 2 methylquinoline 3 4 dicarboxylic acid quinoline 2 4 dicarboxylic acid quinoxaline 2 3 dicarboxylic acid 6 chloroquinoxaline 2 3 dicarboxylic acid 4 4 u2032 diaminophenylmethane 3 3 u2032 dicarboxylic acid quinoline 3 4 dicarboxylic acid 7 chloro 4 hydroxyquinoline 2 8 dicarboxylic acid diimidedicarboxylic acid pyridine 2 6 dicarboxylic acid 2 methylimidazole 4 5 dicarboxylic acid thiophene 3 4 dicarboxylic acid 2 isopropylimidazole 4 5 dicarboxylic acid tetrahydropyran 4 4 dicarboxylic acid.