Question

Tetrachloromethane is the IUPAC name of:
(A) carbon tetrachloride
(B) carbon hexachloride
(C) carbon pentachloride
(D) none of these

Answer 1

Hint: The IUPAC nomenclature of organic chemistry is a method of having organic compounds.
Its full form is the International union of pure and applied chemistry.


Step by step answer: We can follow the following steps while naming the compound.
The given compound is $CC{l_4}$
This is halogen derivatives of alkane
The alkane is methane $(C{H_4})$and all H-atoms of methane is replaced by Ci-atoms.
Since IUPAC name of alkyl halide is halo alkane
There are four Cl-atoms in the compound.
$\therefore $its name is given as$ \to $tetrachloromethane
Molecule has one C-atom and four Cl-atoms
$\therefore $common name for compound is carbon tetrachloride.
The suffix tetra is used for Number four.
Therefore, from the above explanation the correct option is (A) carbon tetrachloride.

Additional Information: Tetra chloromethane is halogen derivatives of methane and obtained by chlorination of methane in presence of sunlight.
$C{H_4} + C{l_2}\xrightarrow{{sunlight}}C{H_3}Cl + HCl$
Methane methyl chloride
$C{H_3}Cl\xrightarrow{{sunlight}}C{H_2}C{l_2} + HCl$
                                   Methane dichloride
$C{H_2}C{l_2} + C{l_2}\xrightarrow{{sunlight}}CHC{l_3} + HCl$
                                                Chloroform
$CHC{l_3}\xrightarrow{{sunlight}}CC{l_4} + HCl$
                                Carbon tetrachloride
H-atoms of methane replace one by one.
This process takes place by free radical mechanisms.
Since all four atoms are the same (Cl-atoms, present around the C-atom, therefore it forms regular tetrahedral geometry.
Cl-atoms are present at vertices of regular tetrahedron and angle between bond is ${109^0}{28^1}$

Note: IUPAC is a universally recognized authority on chemical nomenclature and terminology.
IUPAC develops uniform and consistent nomenclature and terminology for chemical substances.