“…According to our review of the literature, the experimental dihedral angles for mono-, di-, tri-and tetra-ortho Cl-substituted PCB derivatives are 47-51 (Kania-Korwel et al, 2004;Lehmler et al, 2001;McKinney & Singh, 1988;Sluis et al, 1990), 59-75 (Vyas et al, 2006;Miao et al, 1997;Rissanen et al, 1988a;Rømming et al, 1974;Singh et al, 1986), 82-83 (Lehmler et al, 2005;Rissanen et al, 1988b) and 84-87 (Pedersen, 1975;Shaikh et al, 2006;Singh & McKinney, 1979), respectively. As a result of crystal packing effects, the calculated dihedral angles of these PCB derivatives (viz., 57.7 , 73.0 , 89.8 and 89.9 for mono-, di-, tri-and tetra-ortho Clsubstituted PCB derivatives, respectively), in contrast to the title compound, are larger than the solid state dihedral angles.…”