Fulminate CNO

The cyan ate ion. OCN". forms a stable series of salts, but many fulminates. CNO", are explosive (L.fulmirw, to flash). Explsun. (For a lead, seepage 145 for a slightly different approach, see Pauling, L J. Chan. Educ. 1975.52,577.)... 

The preparation of fulminate (CNO) and isocyanate (NCO) complexes, and their reactions, have been reported.17 These include the conversion of [Pd(NCO)2(PPh3)2] to [Pd(NC0)(C02R)(PPh3)2 on reaction with CO and ROH (R = Me, Et). 

All the resonance structures for fulminate (CNO-) involve greater formal charges than in cynate (OCN ), making fulminate more... 

Fulminic Acid, C=N--OH.—Salts of this acid are obtained when nitric acid, alcohol, and mercury or silver are brought together in certain proportions. Mercuric fulminate, (CNO)2Hg, is prepared for use in percussion caps, which are used to explode gunpowder, dynamite, and other explosives. Free fulminic acid is a very unstable volatile liquid. It resembles closely hydrocyanic acid in odor and poisonous properties. 

The fulminate (CNO ) ion may coordinate to a metal through the carbon (M—CNO) or the oxygen (M—ONC) or both. So far, all the complexes containing the CNO group are presumed to be C-bonded. Table 111-44 lists the observed CNO frequencies of typical fulminate complexes. Thus far, not much work has been done on fulminato complexes. 

Cyanates and Related Species. Theoretical calculations of the electronic spectrum of a number of isocyanates HNCO, FNCO, CINCO, and LiNCO have been performed by means of serai-empirical MO methods. The NCO group is found to be non-linear, in agreement with recent experimental results. The results of these calculations have also been used to assign the u.v. photoelectron spectra of isocyanic acid (HNCO). A theoretical analysis of the vibrations of co-ordinated isocyanate (NCO ) and fulminate (CNO ) groups has been carried out the changes in the stretching vibrational frequency of these groups in metal co-ordination compounds have been explained. 

To prepare the first initiator. Mercury Fulminate (CNO)2Hg, we need the following substances. 

II. Filter this solution. When water has drained, add Alcohol (C2H5OH) into the filter paper thus washing the Mercury Fulminate ((CNO)2Hg) further. 

We used 50% concentrated Nitric Acid (HNO3). The Mercury (Hg) didn t react very well. We had to continuously heat it to cause a reaction, which would subside every time we took the heat away. Eventually, a small amount of Mercury Fulminate (CNO)2Hg crystals were formed (maybe 0.3gm) which we left to dry. Their qualify was so useless that we threw them away. Using Nitric Acid (HNO3) of concentration less than 65% will cause useless results like this. 

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