The crystal structure of bis (3hyphen;phenylhyphen;2,4hyphen;pentanedionato)copper(II) has been determined by the use of threehyphen;dimensional Fourier methods and accurate atomic coordinates obtained by threehyphen;dimensional leasthyphen;squares refinements. The crystal belongs to the monoclinic space groupP21/cwith two molecules per unit cell. The cell parameters area=10.250 Aring;;b=6.778 Aring;;c=13.763 Aring;; bgr;=93.55deg;. The final reliability factor (R) is 0.0834. The acetyl carbon skeleton is seen to be tilted by 14deg; from the plane defined by the copper and oxygen atoms. The phenyl ring is bent slightly down from the acetyl carbon skeletonal plane, and is twisted through a torsional angle of 70deg; from the mean plane of the chelate ring.
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