REACTION OF 2,3-DICHLORO-5,6-DICYANO-P-BENZOQUINONE WITH 1,10-PHENANTHROLINE AND THE CRYSTAL-STRUCTURE OF ITS REACTION-PRODUCT

2,3-Dichloro-5,6-dicyano-p-benzoquinone reacted with 1,10-phenanthroli ne to give 1,10-phenanthrolinium hloro-2-cyano-3,6-dioxo-1,4-cyclohexa dien-1-olate. The reaction in acetonitrile solution was observed by th e stopped flow technique and the UV-visible absorption spectra measure ment. The crystal structure of its reaction product was determined by the X-ray diffraction study. The crystal was monoclinic, space group P 2(1) with a=12.323(4), b=4.897(2), c=13.677(3) angstrom, beta=96.51(3) -degrees, V=820.0(8) angstrom3, Z=2, and final R=0.041 for 1280 reflec tions larger than 3sigma(I(o)). The planar cations and anions stack al ong the b axis, respectively, to form the segregated columns.