कोयला टैर या पेट्रोलियम से बने एक सफेद क्रिस्टलीय मजबूत-सुगंधित हाइड्रोकार्बन और कार्बनिक संश्लेषण में और मोथबॉल में एक धूमकेतु के रूप में उपयोग किया जाता है

Noun:

नेफ़थलीन,

naphthalene शब्द के हिंदी अर्थ का उदाहरण:

জজজ नेफ्थालीन, क्विनोलीन, एंथ्रासीन आदि यौगिकों में एक से अधिक वलयों का समावेश हुआ।

naphthalene's Usage Examples:

By fusing two nuclei we obtain the formula of naphthalene, C 1 oH 8; by fusing three, the hydrocarbons anthracene and phenanthrene, C14H10; by fusing four, chrysene, C18H12, and possibly pyrene, C16H1n; by fusing five, picene, C22 H 14.

Certain crude oils have also been found to contain camphenes, naphthalene and other aromatic hydrocarbons.

Structurally naphthalene may be represented as.

NAPHTHYLAMINES, or Aminonaphthalenes, C10H7NH2, the naphthalene homologues of aniline, in contrast to which they may be prepared by heating the naphthols with ammoniazinc chloride.

One of the earliest red-hot tube syntheses of importance was the formation of naphthalene from a mixture of alcohol and ether vapours.

C. Graebe (Ann., 1869, 149, p. 22) orientated the ortho-compound or phthalic acid from its formation from naphthalene on oxidation; the meta-compound or isophthalic acid is orientated by its production from mesitylene, shown by A.

Bamberger opposed Claus' formula on the following grounds: - The molecule of naphthalene is symmetrical, since 2.7 dioxynaphthalene is readily esterified by methyl iodide and sulphuric acid to a dimethyl ether; and no more than two mono-substitution derivatives are known.

When phenol is passed through a red-hot tube a complex decomposition takes place, resulting in the formation of benzene, toluene, naphthalene, 'c. (J.

Instances of its application are found in the separation of orthoand para-nitrophenol, the o-compound distilling and the p- remaining behind; in the separation of aniline from the mixture obtained by reducing nitrobenzene; of the naphthols from the melts produced by fusing the naphthalene monosulphonic acids with potash; and of quinoline from the reaction between aniline, nitrobenzene, glycerin, and sulphuric acid (the product being first steam distilled to remove any aniline, nitrobenzene, or glycerin, then treated with alkali, and again steam distilled when quinoline comes over).

Bamberger, on the other hand, extends his views on benzene and naphthalene and assumes the molecule to be (1).

naphthalene's Meaning':

a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs