tellurides. The stereochemistry of the products has been established with the help of X-ray diffraction studies of 1Aa, 1Ba, 1Bc, 1Cc, 3Aa, 3a and 1B. Intramolecular Te⋯Cl attractive interactions appear to favor the (Z) conformation adopted by the 2-chloro-2-organylvinyltellurium group irrespective of the steric demand of the aryl ligand of the Te(IV) electrophile and the terminal acetylene substituent
终端
乙炔Chlorotelluration,RCH CH([R = PH,1 ; 4-M
EC 6 ħ 4,2 ;吨-Bu,3)用三
氯化aryltellurium和T
ECl 4在回流的
甲苯,得到(2-
氯-2- organylvinyl)
碲( IV)二
氯化物,
氩[R(CL)C CH] T
ECl 2(AR = 1-C 10 ħ 7,1Aa时- 3Aa中; 2,4,6--ME 3 c ^ 6 ħ 2,1Ba时-装置3Ba ; 4- MeOC 6 ħ 4,1CA)和[吨-Bu(CL)C CH] 2 T
ECl 2,图3a分别。用(2,4,6-Me 3 C 6 H 2)[Ph(Cl)C CH] Te(1B)(2,4,6-Me 3 C 6 H 2)还原后,这些用Na 2 S 2 O 5还原的Te(IV)衍
生物得到相应的
乙烯基碲化物。是结晶固体。的二
溴化物(1AB - 3AB,1BB - 3BB,图3b)和二
碘化物(1AC