diazine


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di·a·zine

(dī′ə-zēn′, dī-ăz′ĭn)
n.
A compound containing a benzene ring in which two of the carbon atoms have been replaced by nitrogen atoms.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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The coordinated diazine ring of qx is significantly inclined with respect to the Pt(II) coordination planes.
As a continuation of our interest in the reactions between methionine- and histidine-containing peptides and dinuclear Pt(II) complexes with six-membered aromatic diazines as bridging ligands, in the present study, we describe synthesis and characterization of three new dinuclear platinum(II) complexes, [[{Pt(en)Cl}.sub.2]([mu]-qx)][Cl.sub.2] x 2[H.sub.2]O (1), [[{Pt(en)Cl}.sub.2]([mu]-qz)][(Cl[O.sub.4]).sub.2] (2), and [[{Pt(en)Cl}.sub.2]([mu]-phtz)] [Cl.sub.2] x 4[H.sub.2]O (3) (qx = quinoxaline, qz = quinazoline, phtz = phthalazine, and en = ethylenediamine).
Hydrolysis of Methionine- and Histidine-Containing Peptides Promoted by Dinuclear Platinum(II) Complexes with Benzodiazines as Bridging Ligands: Influence of Ligand Structure on the Catalytic Ability of Platinum(II) Complexes
Pyrimidines are biologically very important heterocycles and represent by far the most ubiquitous members of the diazine family with uracil (6) and thymine (7) being constituents of ribonucleic acid (RNA) and deoxyribonucleic acid (DNA) and with cytosine (8) both being present in Figure 2(b).
Significance and biological importance of pyrimidine in the microbial world

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