Tetrakis[1-[[4-alkyl (C11-C13) phenyl]sulfonyl]- (2S) -pyrrolidinecarboxylate]dirhodium (II)

CCCCCCCCCCCCC1=CC=C (S (=O) (N2CCC[C@H]2C ([O-]) =O) =O) C=C1.[O-]C ([C@@H]3N (S (=O) (C4=CC=C (CCCCCCCCCCCC) C=C4) =O) CCC3) =O.[O-]C ([C@H]5N (S (=O) (C6=CC=C (CCCCCCCCCCCC) C=C6) =O) CCC5) =O.[O-]C ([C@H]7N (S (=O) (C8=CC=C (CCCCCCCCCCCC) C=C8) =O) CCC7) =O.[Rh+2].[Rh+2]