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Ammonia in the ion source. II. Clustering with aromatic nitro compounds
Author(s) -
Gillis Richard G.
Publication year - 1986
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210210707
Subject(s) - nitrobenzene , chemistry , nitro , aniline , nucleophilic substitution , ion , nucleophilic aromatic substitution , cluster (spacecraft) , ammonia , medicinal chemistry , ionic bonding , ionization , ammonium , inorganic chemistry , photochemistry , organic chemistry , catalysis , alkyl , computer science , programming language
Under positive ion chemical ionization conditions with ammonla at relatively low pressure, aromatic nitro compounds do not form [M + H] + ions but often form ionic clusters [M + NH 4 ] + and [M + N 2 H 7 ] + . Nitrobenzene forms a cluster [2M + NH 4 ] + and aniline, formed by nucleophilic substitution, leads to a cluster [anilinium ion + nitrobenzene] + . The dinitrobenzenes form [M + NH 4 ] + clusters and show evidence of nitroaniline formation and clustering. 1,3,5‐Trinitrobenzene gives little indication of clustering or of substitution. The six isomers of trinitrotoluene appear to be stabilized by the methyl group and form clusters up to [M + N 3 H 10 ] + . Nucleophilic substitution leads to dinitrotoluidines, which also form clusters with ammonium ions.