May 2012 issue
Cover illustration: The cis isomer of [Re(C12H24O4P)Cl2O(C18H15P)] was prepared from the corresponding trans isomer by a trans-cis isomerization reaction. The Re atom is in oxidation state +V and exhibits a distorted octahedral Cl2O2P2 coordination environment. As a consequence of the trans influence of the two phosphorus ligands, both Re-Cl bond lengths are elongated. See Skarzynska, Siczek & Gniewek [Acta Cryst. (2012). E68, m605-m606].