Three tetradentate ligands, 1,4,8,11 -tetrathiacyclotetradecane (TTP), 2,5,9,12-tetrathiatridecane (TTT), and 13,14-benzo-1,4,8,11 -tetrathiacyclopentadecane (TTX), have been prepared. The nickel(II) tetrafluoroborate complexes of these ligands are the first low-spin nickel(II) species reported having four thioethers as donors. Ni(TTP)2+ and Ni(TTX)2+ constitute the first reported complexes of tetradentate macrocyclic ligands containing only sulfur donor atoms. Tetragonal Ni(TTP)X2 species, where X = NCS, Cl, Br, and I, have been prepared and their electronic spectra used to calculate a Dqxa of 1070 cm-1 for the macrocycle. The Ni(TTP)I2 com-
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.