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Crystal structures of two isostructural bivalent metal N-benzoyl-glycinates
Kedar U Narvekar1, Bikshandarkoil R Srinivasan1
1School of Chemical Sciences, Goa University PO, Goa 403206, India.
Abstract:
The crystal structures of two coordination compounds of N-benzoyl-glycine, viz. catena-poly[[[di-aqua-bis-(N-benzoyl-glycinato)cobalt(II)]-μ-aqua] dihydrate], {[Co(C9H8NO3)2(H2O)3]·2H2O} , 1, and catena-poly[[[di-aqua-bis-(N-benzoyl-glycinato)nickel(II)]-μ-aqua] dihydrate], {[Ni(C9H8NO3)2(H2O)3]·2H2O} , 2, are described. The structures of 1 and 2 were reported previously [Morelock et al. (1979). J. Am. Chem. Soc. 101, 4858-4866] and redetermined in this work to determine the H-atom coordinates. In the isostructural compounds, the central metal is located on an inversion centre and exhibits a distorted octa-hedral geometry. A pair of terminal aqua ligands disposed trans to each other and a pair of monodentate N-benzoyl-glycinate ligands form the square base and account for four of the six vertices of the octa-hedron. A μ2-bridging aqua ligand links the bivalent metals into one-dimensional chains extending along the c-axis direction. The one-dimensional chains stabilized by O-H⋯O hydrogen bonds are inter-linked by N-H⋯O and C-H⋯O hydrogen-bonding inter-actions.
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