A six-membered alternating boron–oxygen ring, commonly . Three-coordinate boron has a vacant p orbital that accepts oxygen lone-pair donation. This stabilizing delocalization does not imply the same aromaticity or equal bond polarity as benzene.
An organic compound containing a carbon-halogen bond. The bonding environment matters: a vinylic halide has the halogen directly attached to a double-bonded carbon, whereas an allylic halide has it attached to the adjacent saturated carbon.
