O-ethylxanthato halides of tellurium(II)

Abstract

Tellurium(II) haloxanthates were obtained by reaction of tellurium(II) xanthate with chlorine, bromide or iodine; by reaction of tellurium(II) xanthate with tellurium tetrachloride or with cupric chloride or bromide as well as by reaction between tellurium tetrachloride with potassium xanthate. The crystal structure of the bromo-complex has been determined. The unit cell is monoclinic, P21/c, a = 10.636(1), b = 6.030(1), c= 13.364(1) Å, and β = 103.32(1)° with Z = 4; R being 0.077, Rw0.072 for 1396 unique reflections. The crystals are composed of left- and right-handed helices, formed from corner sharing (bromine bridges) of planar Te(S2COEt)Br2 units. The ROC bond length (1.270(12)Å) is the..