Question

What is the IUPAC name of $C{H_3}CH = CHC(Br){(C{H_3})_2}$

Answer 1

Hint : IUPAC stands for international union of pure and applied chemistry. IUPAC was formed in $1919$ . It is a NGO registered in Switzerland with headquarters in North Carolina, U.S.A. IUPAC is a member of ISC (international science council). The first ever president of the IUPAC was Charles Moureu of France. The only Indian to be president of IUPAC was Sir C.N.R. Rao for the years of $1985 - 1987$ .

Complete Step By Step Answer:
IUPAC is best acknowledged for the nomenclature and giving the standard rules for giving the names to various complexes. IUPAC is not just restricted to chemistry only like IUPAC has named various nucleotides, code names, sequence code names. IUPAC has also standardized the atomic weights of all the elements.
The IUPAC naming rules have three parts: (i) word root, (ii) suffix, (iii) prefix.
The word root consists of the main carbon chain e.g., meth, eth, prop, but and so on. Suffix consists of the naming the position of bonds single, double or triple (-ane, -ene,-yne) and the position of functional groups like –ol for alcohols, -al for aldehydes, -one for ketones, -oic acid for carboxylic acids and many more. Prefix consists of the group which includes the substituents which are not the functional groups like fluoro for fluorine, chloro for chlorine and many more. The formula is as follows for the nomenclature is Prefix $+$ Word root $+$ primary suffix $+$ secondary suffix.
The name of $C{H_3}CH = CHC(Br){(C{H_3})_2}$ is $4$ -Bromo $4$ -methyl pent $2$ ene.

Note :
Historically, the organic compounds were named after the scientist’s like pepsin, etc. Some were given the local names like sirka for vinegar. But both the styles were not as useful, as local names vary from place to place and the scientist’s were too complicated to remember. Thus IUPAC came up with rules applicable to all.