Top 10 similar words or synonyms for diazine

diazole    0.847083

benzopyrane    0.824794

benzodioxepine    0.816108

benzooxazole    0.810900

pyrimidinoimidazole    0.809078

azabenzimidazole    0.808493

pyrrolopyrazole    0.808296

naphthothiazole    0.805377

phenoxathiine    0.805250

pyrane    0.803588

Top 30 analogous words or synonyms for diazine

Article Example
Diazine Diazines are a group of organic compounds having the molecular formula CHN. Each contains a benzene ring in which two of the C-H fragments have been replaced by isolobal nitrogen. There are three isomers:
Pyridine Many analogues of pyridine are known where N is replaced by other heteroatoms (see figure below). Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (CHN), with the names pyridazine, pyrimidine, and pyrazine.
Uracil Uracil can be used to determine microbial contamination of tomatoes. The presence of uracil indicates lactic acid bacteria contamination of the fruit. Uracil derivatives containing a diazine ring are used in pesticides. Uracil derivatives are more often used as antiphotosynthetic herbicides, destroying weeds in cotton, sugar beet, turnips, soya, peas, sunflower crops, vineyards, berry plantations, and orchards.
Pyrimidone Pyrimidone is the name given to either of two heterocyclic compounds with the formula CHNO: 2-pyrimidone and 4-pyrimidone. The compounds can also be called "2-hydroxypyrimidine" or "4-hydroxypyrimidine" respectively, based on a substituted pyrimidine, or 1,3-diazine, ring.
Phenazine Phenazine (CHN or CHNCH), also called azophenylene, dibenzo-p-diazine, dibenzopyrazine, and acridizine, is a dibenzo annulated pyrazine and the parent substance of many dyestuffs, such as the toluylene red, indulines and safranines (and the closely related eurhodines). Phenazine crystallizes in yellow needles, which are only sparingly soluble in alcohol. Sulfuric acid dissolves it, forming a deep-red solution.
Magnetic inequivalence Any 4-substituted pyridine, pyridine itself, 1-substituted pyrazinium ion, diazine, 1-substituted or unsubstituted pyrrole and related aromatic heterocyclics (phospholes, furan, thiophene, "etc.") as well as unsubstituted or 1-substituted cyclopentadienes and 1-substituted cyclopentadienides all have the same symmetry framework as para-disubstituted or ortho-homodisubstituted benzenes, and will present chemically equivalent but magnetically inequivalent pairs of protons. In heterocycles and in five-membered rings in general, however, "J" values can be significantly smaller than in benzenes and the manifestation of magnetic inequivalence may be subtle.
Inverse electron-demand Diels–Alder reaction DA reactions have been utilized for the synthesis of several natural products, including (-)-CC-1065, a parent compound in the Duocarmycin series, which found use as an anticancer treatment. Several drug candidates in this series have progress into clinical trials. The DA reaction was used to synthesise the PDE-I and PDE-II sections of (-)-CC-1065. The first reaction in the sequence is a DA reaction between the tetrazine and vinyl acetal, followed by a retro-Diels–Alder reaction to afford a 1,2-diazine product. After several more steps, an intramolecular DA reaction occurs, followed again by a retro Diels-Alder in situ, to afford an indoline product. This indoline is a converted into either PDE-I or PDE-II in a few synthetic steps.
Melting point In organic chemistry, Carnelley's Rule, established in 1882 by Thomas Carnelley, states that "high molecular symmetry is associated with high melting point". Carnelley based his rule on examination of 15,000 chemical compounds. For example, for three structural isomers with molecular formula CH the melting point increases in the series isopentane −160 °C (113 K) n-pentane −129.8 °C (143 K) and neopentane −16.4 °C (256.8 K). Likewise in xylenes and also dichlorobenzenes the melting point increases in the order meta, ortho and then para. Pyridine has a lower symmetry than benzene hence its lower melting point but the melting point again increases with diazine and triazines. Many cage-like compounds like adamantane and cubane with high symmetry have relatively high melting points.
F-block metallocene The first prepared and well-characterized f-block metallocenes were the tris(cyclopentadienyl) lanthanide complexes, (CH)Ln (Ln = La, Ce, Pr, Nd, Sm and Gd). However, their significance is limited more to their existences and structures than to their reactivity. The cyclopentadienyl ligands of f-block metallocenes were considered as inert ancillary ligands, only capable of enhancing their stability and solubility, but not their reactivity. In addition, only late and small metals in the lanthanide series, i.e., elements from Sm to Lu, are trivalent metallocene complexes, [(CH)LnZ] In 1980, the pentamethylcyclopentadienyl ligand, CMe, was introduced to prepare the lanthanide complexes with all metals in the series. Apart from improving the stability and solubility of the complexes, it was demonstrated to participate in organometallic reactions. Subsequently, Evans, W. J. and his coworkers successfully isolated (CMe)Sm(THF) and (CMe)Sm, making a breakthrough in f-block metallocenes, since both of these two organosamarium(II) complexes were unexpectedly found to participate in the coordination, activation and transformation of a variety of unsaturated compounds, including olefins, dinitrogen, internal alkynens, phosphaalkynes, carbon monoxide, carbon dioxide, isonitriles, diazine derivatives, imines and polycyclic aromatic hydrocarbons (PAHs). Moreover, due to its strong reducing potential, it was used to synthesize [(CMe)Sm(µ-H)] and other trivalent f-block element complexes. Subsequently, tris(pentamethylcyclopentadienyl) lanthanide complexes, (CMe)Ln, and their relevant complexes were synthesized from Sm complexes. These metallocenes included (CMe)Sm, [(CH(SiMe)]Sm, (CMe)Sm(CH), [(CMe)Sm](µ-CH). Later, one tris(pentamethylcyclopentadienyl) f-element halide complex, (CMe)UCl, was successfully isolated as the intermediate of the formation of (CMe)UCl. It is worthy mentioning that (CMe)UCl has a very similar structure as (CMe)U and its uranium-chloride bond (2.90 Å) is relatively longer than the uranium-chloride bonds of other analogues. Its existence also indicates that the larger f-block elements are capable of accommodating additional ligands in addition to the three cyclopentadienyl ligands resulting in the isolation of the following complexes: (CMe)UF, (CMe)THz and (CMe)MH.