Hydrazine complex, molecular structure

Tricarbonyl(vinylketene)iron(0) complexes were shown to react with dimethyl maleate, dimethyl fumarate, ( )-methyl 4-oxopent-2-enoate and ( )-ethyl 4,4,4-trifluorobut-2-enoate to give decarbonylated adducts. " New (77 -azadiene)Fe(CO)3 complexes containing furan, thiophene or ferrocenyl moieties at the G terminus of the heterodiene complexes have been prepared.X-ray crystal structures and extended Hiickel calculations of the new materials have been reported. Gomplexation of Fe2(GO)9 with iV,iV -bis(3-phenylallylidene)hydrazine in refluxing THF affords new ( 7" -azadiene)Fe(GO)3 complexes.Molecular structures of the new complexes have been confirmed by X-ray diffraction studies. 

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... 

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.

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. 

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. 

Complex formation with flic substrate is the key stage of many catalytic processes. The formation of the following types of organometallic complexes is most typical in catalysis alkyl 7i-complexes, carbene complexes, n-complexes of substrates with the saturated bond (olefin, acetylene and allyl, complexes with carbon oxides), hydrazine complexes, and complexes with molecular oxygen and nitrogen. The structure of a ruthenium complex with CO2 obtained on the basis of an ab initio study is presented in Fig. 17.4. 

The existence of crystalline complexes of cellulose and certain low molecular weight compounds has been known since the 1930 s, and several studies of their structures by X-ray methods have been reported since that time (1-6). These structures are of current relevance In view of the renewed Interest In organic solvents for cellulose In the last 15 years several new solvent systems have been reported. Including dlmethylsulfoxlde-para-f ormaldehyde (7 ), N-methylmorpholine-N-oxlde ( ), hydrazine at elevated temperature and pressure (9 ), and lithium chlorlde-dlmethylacetamlde (10). Analysis of the structure of cellulose solvent complexes provides a detailed molecule model for the polymer solvent Interaction. This paper describes our analyses of the structures of cellulose complexed with ethylenedlamlne, hydrazine, and 1,3-propylenedlamlne. 

Among coordination compounds of d transition metals with n-donor two-center ligands, peroxo complexes have been studied in the greatest detail the search for methods of molecular nitrogen fixation has stimulated studies on the structures of complexes with hydrazine derivatives. As a rule, only X-ray diffraction data are available for these complexes [10],... 

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