Synthesis and structure of 1,1',1''-[(2-bromo-eth-oxy)methane-tri-yl]tri-benzene and 1,1',1''-[(2-iodoeth-oxy)methane-tri-yl]tri-benzene.

The present study reports on the mol-ecular structures and syntheses of 1,1',1''-[(2-bromo-eth-oxy)methane-tri-yl]tri-benzene, C21H19BrO, and 1,1',1''-[(2-iodo-eth-oxy)methane-tri-yl]tri-benzene, C21H19IO. Both compounds crystallized from a saturated solution in THF by slow vapour diffusion of n-hexane in the monoclinic space group P21/c. While the two independent mol-ecules in the asymmetric unit of 1,1',1''-[(2-iodo-eth-oxy)methane-tri-yl]tri-benzene show no close contacts to other mol-ecules, in the structure of 1,1',1''-[(2-bromo-eth-oxy)methane-tri-yl]tri-benzene the mol-ecules inter-act with each other via C-H⋯π contacts.