Preparation and structure of 1RS,4SR,7SR,10RS- (1,4,7,10-tetraazacyclopentadecane)copper(II) tetrachlorozincate

Abstract

The structure of 1RS,4SR,7SR,10RS-(1,4,7,10-tetraazacyclopentadecane)copper(II) tetrachlorozincate, determined at 120 K, is reported: C₁₁H₂₆Cl₄CuN₄Zn, orthorhombic, P b c a (Hall−P 2ac 2ab); a, 14.0675(7); b, 14.4206(6); c, 18.2106(10) Å. The cation has approximate two-fold symmetry, with the CuN₄ group tetrahedrally twisted, with NH groups alternating on opposite sides of the N₄ group around the ring. The five-membered chelate rings have gauche conformations and the eight-membered chelate ring has an extended twist conformation. The anion and cation are linked into chains by hydrogen bonds and weak Cu···Cl interactions.

Keywords:

• Crystal structure
• Copper(II) compound
• 1,4,7,10-Tetraazacyclopentadecane
• Cyclic tetraamine
• Chelate rings