Dimensional control of Cu(I)-bis(4-pyridyl)ethylene coordination networks

Reaction of [Cu(MeCN)(2)(PPh3)(2)]PF6 with 1,2-bis(4-pyridyl)ethylene (bpe) produces either a layered hexagonal coordination network, [Cu(bpe)(1.5)(PP h2)](infinity)(+), if made from CH2Cl2/THF solutions, or a linear zigzag po lymer, [Cu(bpe)(PPh3)(2)](infinity)(+]), if crystallized using CHCl3/THF. B oth compounds include significant amounts of solvent as well as the non-coo rdinating anions within intercrystalline channels, In the former case, the reaction to remove one PPh3 from the Cu(I) reagent complex competes effecti vely with the precipitation/crystallization step, whereas in the latter cas e, crystal growth occurs first. (C) 2001 Elsevier Science B.V. All rights r eserved.