Question
Write Electronic configuration of Third transition metal : Re
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and
, which is an example of allylic halide?1-Propoxypropane.

$\text{CH}_3\text{COCH}_2\text{COOC}_2\text{H}_5\xrightarrow[(\text{ii})\text{ H}^+]{(\text{i})\text{ NaBH}_4}$
CH3CH2CHBrCH2CH(CH3)CHO
4-Oxopentanal.