What is the IUPAC name of isocyanide : isonitrile or carbylamine?
Are "methyl isocyanide" and "carbylamine" the same thing?
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$\begingroup$ Note that carbylamines is an obsolete and deprecated name for isocyanides (isonitriles). $\endgroup$ – mykhal Jan 11 at 18:32
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The most recent IUPAC recommendations[1] states that:
P-61.9: Preferred IUPAC names are formed substitutively using the prefix ‘isocyano’ attached directly to a parent hydride.
This is a change from previous recommendations, and differs from some of your examples above.
To give a concrete example, $\ce{C6H5NC}$ should be named isocyanobenzene - this is known as a PIN by IUPAC (preferred IUPAC name). Phenylisocyanide is also acknowledged as an acceptable trivial name (a name that does not conform to the recommendations but is still commonly used).
[1]: IUPAC Recommendations for Preferred Names 2013, Chapter P-6. DOI:10.1039/9781849733069-00648
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$\begingroup$ Can I get an example of an open chain compound with isocyanide group IUPAC name attaching suffix $\endgroup$ – Sounak Biswas Nov 30 '17 at 8:15
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$\begingroup$ Isocyanoethane. The nomenclature system is universal, you just need to know the correct prefix. $\endgroup$ – NotEvans. Nov 30 '17 at 15:08
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$\begingroup$ Okay that means in case of isocyanide we will not use suffix but in case of cyanides we will still use the suffix "nitriles" $\endgroup$ – Sounak Biswas Nov 30 '17 at 16:56
