CRYSTAL-STRUCTURE OF 1-(4-PYRIDYLMETHYL)-2,4,6-TRIPHENYL PYRIDINIUM PERCHLORATE

1-(4-pyridylmethyl)-2,4,6-triphenyl pyridinium perchlorate crystallize s in space group P1BAR with 3 molecules per asymmetric unit. The cell parameters obtained are: a = 12.142(3), b = 16.972(4), c = 20.229(7) a ngstrom, alpha = 83.66(4), beta = 74.83(3), and gamma = 69.47(2)-degre es. The crystal structure was determined using the direct methods tech nique. Anisotropic refinement was undertaken using block diagonal leas t squares. In the final cycle of the refinement the reliability factor was found to be R0 = 0.084 for 3982 reflections with I greater-than-o r-equal-to 3sigma (I). All rings are planar within experimental errors . Rings B, C, D, and E are twisted with respect to the central plane.