Write a detailed step-by step reaction mechanism identifying the products from each step of the following Wittig reaction of the alkyl bromide 29 with propanal (32). As part of your answer identify the structures of the phosphonium salt 30, the phosphorane 31, the oxaphosphetane 33 and use a simple model to identify whether the E- or Z- geometric isomer of the target alkene 34 is obtained. Annotate your simple model drawing with brief notes.

(c) Write a detailed step by step reaction mechanism identifying the products from each step of the following Wittig reaction of the alkyl bromide 29 with propanal (32). As part of your answer identify the structures of the phosphonium salt 30, the phosphorane 31, the oxaphosphetane 33 and use a simple model to identify whether the E- or Z-geometric isomer of the target alkene 34 is obtained. Annotate your simple model drawing with brief notes. PPh BrPhosphonium salt 30 NaoEt Phosphorane 31 29 CHO 32 Phapo and Target alkene 34 oxaphosphetane 33 (8 marks)