Single crystal was mounted on a glass fiber at
room temperature. The crystal was then placed on a Bruker SMART APEX CCD diffractometer, equipped with Mo Ka radiation.
Systematic absence and intensity statistic were used in space group determinations. The structure was determined using
direct methods [25]. Anisotropic structure refinement was achieved using full-matrix, least-squares techniques on all nonhydrogen
atoms. All hydrogen atoms were placed in idealized positions, based on hybridization, with isotropic thermal
parameter fixed at 1.2 times the value of the attached atom. Structure solution and refinement was performed using
SHELXTL v 6.10