Stereochemical role of lone pairs in main-group elements. Part 3. Structure and bonding in trichloro(1,4,7,10,13-pentaoxacyclopentadecane)antimony(III) studied by means of X-ray crystallography at 120 K

Abstract

The crystal structure of the complex formed between SbCl₃ and 15-crown-5(1,4,7,10,13-pentaoxacyclopentadecane,L) has been determined from X-ray diffractometer data by Patterson and Fourier methods. Crystals are orthorhombic, space group P2₁2₁2₁, with Z= 4 in a unit cell of dimensions a= 7.575(1), b= 12.734(2), and c= 15.838(3)Å. The structure, refined to R= 0.033 for 1989 observed reflections, consists of discrete SbCl₃L molecules in which antimony is sandwiched between essentially parallel planes containing five oxygens and three chlorines, respectively.