the ligand L 'used may be a di-, tri- or tetracarboxylic acid chosen from the group comprising: C 2 H 2 (CO 2 H) 2 (fumaric acid) , C 2 H 4 (CO 2 H) 2 (sucrose acid), C 3 H 6 (CO 2 H) 2 (glutamic acid), C 4 H 4 (CO 2 H) 2 (muconic acid), C 4 H 8 (CO 2 H) 2 (adipic acid), C 7 H 14 (CO 2 H) 2 (azelaic acid), C 5 H 3 S (CO 2 H) 2 (2,5-thiophene dicarboxylic acid), C 6 H 4 (CO 2 H) 2 (terephthalic acid), C 6 H 2 N 2 (CO 2 H) 2 (2,5-pyrazine dicarboxylic acid), C 10 H 6 (CO 2 H) 2 (naphthalene acid) 2,6-dicarboxylic acid), C 12 H 8 (CO 2 H) 2 the ligand L 'used may also be chosen from the group comprising: 2,5-diperfluoroterephthalic acid, azobenzene 4,4'-dicarboxylic acid, 3,3'-dichloro azobenzene 4,4'-dicarboxylic acid, 3,3'-dihydroxoazobenzene 4,4'-dicarboxylic acid, 3,3'-diperfluoroazobenzene 4,4'-dicarboxylic acid, 3,5,3 ', 5'-azobenzene tetracarboxylic acid, 2,5-dimethyl terephthalic acid, perfluoro glutaric acid
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There is also a huge push for tax parity which is basically a fancy way of saying they want to tax pouches and vapes at the same high rates as cigarettes because they dont want to lose out on revenue as people switch away from traditional smoking
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