(a) The reaction betwEPn BiCI3 and 3 equivalents of EtMgCl yields compound X as the organo- product. Two equivalents of Bil3 react with 1 equivalent of X to produce 3 equivalents of compound Y. In the solid state, Y has a polymeric structure consisting of chains in which each Bi centre is in a square-based pyramidal environment. Suggest identities for X and Y, and draw possible structures for part of a chain in crystalline Y.
(b) The reaction betwEPn TeCl4 and 4 equivalents of LiC6H4-4-CF3 (LiAr) in Et20 leads to Ar6Te, Ar3TeCl and Ar2Te as the isolated products. Suggest a pathway by which the reaction may take place that accounts for the products.
The reaction of R'SbCl2 with RLi (R = 2- Me2NCH2C6H4, R1 = CH(SiMe3)2) leads to RR'SbCl. In the solid state, RR'SbCl has a molecular structure in which the Sb centre is coordinate; RR'SbCl is chiral. Suggest a structure for RR'SbCl and draw structures of the two enantiomers.
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