DIRECT SYNTHESIS AND CRYSTAL STRUCTURE OF DIIODOETHYLENDIAMINELEAD(II) DIMETHYLSULFOXIDE

Abstract

Abstract A direct method of obtaining PbEnI2.DMSO is reported. The crystal structure of the compound was determined by X-ray techniques. PbEnI2.DMSO is triclinic, space group P 1, C4H14I2N2PbS, a=10.225(3), b=10.132(3), c=6.900(2) Å; α=90.83(2), β=88.30(2), γ=106.35(4)°; V=685.6(4) Å3; z=2, calculated density 2.92 gcm−3. Neutral PbEnI2 complexes are associated with DMSO molecules via H-bonds. The lead(II) ion is covalently linked with a chelated En molecule (Pb-N 2.46–2.48 Å) and I− anions (Pb-I 3.087–3.343 Å). Covalently bonded atoms form an umbrella-like coordination Pb(II) polyhedron. The side containing the lone electron pair of the lead(II) ion has coordination completed by two I− anions of neighbouring molecules with the Pb-I 3.621–3.627 Å.