Hydrazine molecular structure

Uson, R., Laguna, A., Vdlacampa, M.D., Jones, P.G. and Sheldrick, G.M. (1984) Reactions of cis-diisocyanidebis (perfluorophenyl)gold(III) complexes with hydrazines. Crystal and molecular structure of bis(perfluorophenyl)[3-phenyl-l,4-bis(p-toluidino)-2,3-diazabut-l-en-l-yl-4-ylidene]gold. Journal of the Chemical Society, Dalton Transactions, (9), 2035-2038. 

Fig. 42. (Left) Molecular structure of the hydrazine complex 83 in the crystal. (Right) Central N3Ni(/t-S)2(/ i,2-N2H4,)NiN -> core in 83. The figure was generated using data downloaded from The Cambridge Crystallographic Data Center (CCDC) and corresponds to the structure originally reported in Ref. (242).

MoOCl2(PMe2Ph)3] reacts with 1,2-disubstituted hydrazines, PhCONHNHR, (R = Ph, 1-naphthyl, p-MeO-QH, p-Me QH4, or p-Cl-C H ) to give the red. diamagnetic crystalline molybdenum-arylimido-complexes (91). The full reports of the crystal and molecular structures of... 

Texas Red hydrazide is a derivative of Texas Red sulfonyl chloride made by reaction with hydrazine (Molecular Probes, Pierce). The result is a sulfonyl hydrazine group on the No. 5 carbon position of the lower ring structure of sulforhodamine 101. The intense Texas Red fluorophore has a quantum yield that is inherently higher than either the tetramethylrhodamine or the Lissamine rhodamine B derivatives of the basic rhodamine molecule. Texas Red s luminescence is shifted maximally into the red region of the spectrum, and its emission peak only minimally overlaps with that of fluorescein. This makes derivatives of this fluorescent probe among the best choices of labels for use in double staining techniques. 

Table VII shows that for cesium sorption, both KC1 and N H4 are significant for the two geologic solids studied. The negative values indicate that the presence of either KC1 or lowers sorption. Both appear to be competing with Cs+ ion for sorption sites. Competition between K+ and Cs+ ions for sorption sites on mica-like minerals is well known. However, displacement of Cs+ by hydrazine was surprising since N H, should exist mainly as a neutral species at pH 9-10. A small amount (0.0005M to 0.005M) will be protonated and apparently competes with Cs+. Ammonium ion is known to effectively compete with Cs+ for mineral sorption sites. Hydrazinium ion with a similar molecular structure should also displace Cs+. Since hydrazine will not reduce or complex Cs+, the only possible effects on cesium sorption is to compete for sorption sites or to alter the surface of the solid minerals. No evidence of surface alteration (change in color or texture) was observed. Therefore, it appears that an Eh buffer is not required for Cs+ sorption studies and hydrazine only interferes with the sorption reaction.

This chapter describes the preparation and molecular structure of a compound, 1, in which hydrazine itself is coordinated to two molybdenum atoms. 

Fig. 10. Molecular structure of a bicyclic tetrasilylated hydrazine [(CH2)3(SiH2)2N]j [27]...

The molecular structure of hydrazine (N2H4). This arrangement minimizes the repulsion between the lone pairs on the nitrogen atoms by placing them on opposite sides. 

Amines, hydrazines, and hydroxylamines. Amine complexes are known for tetravalent complexes of the earliest actinides (Th, U), particularly for the halides, nitrates, and oxalates. The complexes are generated either in neat amine, or by addition of amine to the parent compound in a nonaqueous solvent. Some of the known simple amine compounds are presented in Table 6. The molecular structure of ThCl4(NMe3)3 has been determined. The coordination environment about the metal is a chloride capped octahedron. A very limited number of adducts exist in which a tetravalent actinide is coordinated by a hydrazine or hydroxylamine ligand the parent compound is generally a halide or sulfate complex. Cationic metal hydrates coordinated with primary, secondary, or tertiary amines have also been isolated with acetylacetonate, nitrate, or oxalate as counterions. 

Hyponitrous acid. In contrast to nitrous and nitric acids, hyponitrous acid crystallizes from ether as colourless crystals which easily decompose, explosively if heated. The detailed molecular structure of this acid has not been determined, but it is known that the molecular weights of the free acid and its esters correspond to the double formula, H2N2O2, that it is decomposed by sulphuric acid to N2O, and that it can be reduced to hydrazine, H2N-NH2. Infrared and Raman studies show conclusively that the hyponitrite ion has the trans configuration (a), but the N-N frequency suggests that the central bond has an order of rather less than two. ... 

Ethoxy-1,1,1 -trifluoro-3-butene-2-one and 3-trilluoroacetyl-3,4-dihydro-2//-pyran react with phenylhydrazine in ethanol, forming the corresponding trifluoromethyl derivatives of pyrazole (01JFC(107)107). Under the same reaction condition treatment these compound with pentafluorophenyl hydrazine or tetrafluorophenyl hydrazine did not give the expected N-fluorinated phenyl pyrazole, it give undehydrated products—5-hydroxy-1-pentafluorophenyl-5-trifluoromethyl-4,5-dihydropyrazole (the molecular structure was identified by X-ray analysis) (01JFC(107)107) (Scheme 101). 

Wilcox, C. R, Bauer, S. H. (2003). DFT Calculations of Thermochemical and Stmctural Parameters of Tetra-cyanohydrazine and Related Tetrasubstituted Hydrazines. Journal of Molecular Structure Theochem, 625, 1-8. 

Yamamoto A, Miura Y, Ito T, et al. Preparation, x-ray molecular structure determination, and chemical properties of dinitrogen-coordinated cobalt complexes containing triphenylphosphine ligands and alkali metal or magnesium. Protonation of the coordinated dinitrogen to ammonia and hydrazine. Organometallics. 1983 2 1429-1436. 

---