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C 30 H 20 N 2 O 16 , monoclinic,  C 12/ c 1 (No. 15),  a  = 12.021(6) Å,  b  = 15.469(7) Å,  c  = 15.436(7) Å, β = 110.806(7)°,  V  = 2683.2Å 3 ,  Z  = 4,  R  gt  (F)  = 0.063,  wR  ref  (F  2  )  = 0.143,  T  = 298 K.

Crystal structure of 4,4'-bipyridin-1-ium bi(trihydrogen- 1,2,4,5-benzenetetracarboxylate), C 30 H 20 N 2 O 16