The structure of monoaquabis(2-ethoxybenzoato)calcium(II)

ClsH20CaO7 is orthorhombic, space group P21212 t, with a - 6.61 (5), b -- 10.76 (5), c = 26.62 (5) A, U = 1893.31 A 3, z -- 4, d m -- 1.38 (2), d c -- 1.36 Mg m -3, F(000) = 806.57, #(Cu Ka) = 3.068 mm -1. The structure was solved by direct methods, using visually estimated integrated Weissenberg data, to give a final R = 0.104 for 1236 independent reflections. The Ca atom is eight-coordinate with a distorted bicapped trigonalprismatic geometry, and the molecular structure develops as a linear polymer, through the formation of four-membered Ca-O-Ca-O rings, to feature a tight packing of the metal ions along the chain axes. No hydrogen-bond interactions are present between adjacent chains and cohesion in this direction is limited to packing interactions.