Light-driven structural transformations in isotypical Cd( ii ) complexes: stereoselectivity and photosalient motion

] (4) and (5) Hbz = benzoic acid, H4-clbz = 4-chlorobenzoic acid, and H4-brbz = 4-bromobenzoic acid. Complexes 2 and 3 are 4-clbz based polymorphs, while 4 and 5 are 4-brbz based polymorphs. Interestingly, complexes 1, 2 and 4 form head-to-head (HH) dimers, while 3 and 5 form head-to-tail (HT) dimers through photodimerization.