C-H-CENTER-DOT-CENTER-DOT-CENTER-DOT-PI INTERACTIONS IN ETHYNYLBENZENES - THE CRYSTAL-STRUCTURES OF ETHYNYLBENZENE AND 1,3,5-TRIETHYNYLBENZENE, AND A REDETERMINATION OF THE STRUCTURE OF 1,4-DIETHYNYLBENZENE
Hc. Weiss et al., C-H-CENTER-DOT-CENTER-DOT-CENTER-DOT-PI INTERACTIONS IN ETHYNYLBENZENES - THE CRYSTAL-STRUCTURES OF ETHYNYLBENZENE AND 1,3,5-TRIETHYNYLBENZENE, AND A REDETERMINATION OF THE STRUCTURE OF 1,4-DIETHYNYLBENZENE, Chemical communications, (18), 1997, pp. 1703-1704
The crystal structures of 1,4-diethynylbenzene 1 and 1,3,5-triethynylb
enzene 2 show similar packing principles with CH ...pi (triple bond)-z
igzag networks; surprisingly, the packing motif of ethynylbenzene 3 is
quite different.