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Reactions of 2‐, 3‐ and 4‐aminobenzoic acids with alkaline earth metals in the presence of 1,10‐phenanthroline (phen) have been investigated. Compounds [Ca(2‐aba)2(phen)2(OH2)2] (1), [Ca(3‐aba)2(phen)(OH2)3](phen)(H2O) (2) and [Ca(4‐aba)(phen) (OH2)4](4‐aba)(phen) (3) were synthesized from the corresponding metal precursors and 1,10‐phenanthroline. The synthesis of [Sr(2‐aba)2(phen)2(OH2)2] (4), [Sr(3‐aba)2(phen)2(OH2)] (5), [Sr (4‐aba)(phen)(OH2)4](4‐aba)(phen) (6), [Ba(2‐aba)2(phen)2(OH2)2], (7), [Ba(3‐aba)2(phen)2(OH2)4] (8), and [Ba(4‐aba)(phen)2(OH2)3] (4‐aba)(H2O) (9) were accomplished from corresponding metal carbonates and aminobenzoic acids. The single crystal X‐ray diffraction studies show that the complexes exist as discrete monomeric units held together by hydrogen bonding. The 2‐aminobenzoate complexes 1, 4, and 7 are found to be isostructural where the metal ions are eight coordinated. The 4‐aminobenzoate complexes 3, 6, and 9 exist as ion pairs. Carboxylate ligand prefers to bind the metal in a monodentate mode in most of these complexes. The molecules interact in the solid state via nonbonding interactions like hydrogen bonds and π‐π stacking.
Dedicated to Professor Herbert W. Roesky for his outstanding contributions to chemistry.
This work was financially supported by DST and CSIR, New Delhi. R.M. thanks DST for a Swarnajayanti Fellowship and R. K. thanks CSIR for a Senior Research Fellowship.
Notes
Dedicated to Professor Herbert W. Roesky for his outstanding contributions to chemistry.
This work was financially supported by DST and CSIR, New Delhi. R.M. thanks DST for a Swarnajayanti Fellowship and R. K. thanks CSIR for a Senior Research Fellowship.