One of our ongoing efforts is to design and synthesize magnetically active metal organic compounds. This work reports the synthesis and single crystal structures of a one-dimensional metal organic framework (MOF), Cu(bipa)(py)2 (H2bipa = 5-bromo-1,3-isophthalic acid ; py = pyridine) and a two-dimensional MOF, Co(ipa)(bpe) (bipa = isophthalic acid ; bpe = 1,2-bis(4-pyridyl)-ethane). The crystal structure of Cu(bipa)(py)2 (monoclinic, C2/c, a = 25.839(5) �, b = 10.240(2) �, c = 16.737(3) �, β = 129.53(3)�) and Co(ipa)(bpe) (triclinic, P-1, a = 10.0555(5) �, b = 10.0729(5) �, c = 10.0756(5) �, α = 78.7930(10)�, β = 69.3120(10)�, γ = 85.3400(10)�) are both built upon a similar secondary building units (SBU), Cu(II)2(COO)2 or Co(II)2(COO)2. �The metal centers are bridged by carboxylate groups from either the bipa or ipa ligands. Additionally, each metal center binds to a third bipa or ipa. The SBUs are further interconnected through four bipa or ipa, resulting in double-stranded chains parallel to the b-axis (Cu) or c-axis (Co). Two py molecules complete the Cu coordination whereas two bpe molecules complete the Co coordination. Both result in trigonal bipyramid coordination around each metal center by forming terminal bonds at the apical positions. Within the SBU, the shortest Cu-Cu distance is 4.597 �, while the shortest Co-Co distance is 4.472 �. For the Co structure, bpe connects the one-dimensional chains of SBUs into a two-dimensional layered structure. The magnetic properties of these materials are being investigated and the results will be discussed.
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