A redetermination of the crystal and molecular structure of nickel(II) ethylmethylglyoxime

Bowers, Raymond Harold; Banks, Charles V.; Jacobson, R. A.

doi:10.1107/s056774087200603x

Cited by 27 publications

(14 citation statements)

References 8 publications

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“…The structural function of the chlorine ions is to connect adjacent cations through hydrogen bonds involving the aniline nitrogen. The structure of the chelate system is similar to that found in other glyoxime complexes with a short hydrogen bond [O(1)... H(8)...O(2')*=2.491 +0.008 A] in which the hydrogen atom is in the middle of the line joining the two oxygens (Chiesi Villa, Gaetani Manfredotti & Guastini, 1973;Bowers, Banks & Jacobson, 1972;Murmann & Schlemper, 1967;Calleri, Ferraris & Viterbo, 1967;Godycki & Rundle, 1953).…”

Section: Description Of the Structure And Discussionsupporting

confidence: 66%

The crystal and molecular structure of bisanilinebis(dimethylglyoximato)cobalt(III) chloride

Battaglia¹,

Corradi²,

Palmieri³

et al. 1974

Acta Crystallogr Sect B

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Crystals of the title compound, [Co(Hdmg)z(aniline)z]Cl (Hdmg is the dimethylglyoximato mono-anion), are monoclinic, space group C2/c with a=27.44 (1), b=6.32 (1), c=17.72 (1)A.; fl= 129.7 (1) ° and Z=4. The structure has been solved by Patterson and Fourier methods and refined by block-diagonal least squares (final R=4.3 %). The nitrogen atoms of two aniline molecules coordinate to cobalt in an octahedral axial position with respect to the plane of the chelate dimethylglyoximatocobalt(IlI) system. The approach distance of the aniline nitrogen to metal is significantly greater (2.001 A.) than those involving the dimethylglyoximato nitrogen atoms in the chelation plane

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Section: Description Of the Structure And Discussionsupporting

confidence: 66%

The crystal and molecular structure of bisanilinebis(dimethylglyoximato)cobalt(III) chloride

Battaglia¹,

Corradi²,

Palmieri³

et al. 1974

Acta Crystallogr Sect B

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“…Both belonging to the orthorhombic crystal system, Ni(dmg) 2 and Ni(nox) 2 have metal-metal (M-M) distances of 3.245 Å and 3.237 Å, respectively. 31,43 Ni(meg) 2 reportedly has R and β crystal forms, 44,45 the former monoclinic (eclipsed packing), with M-M ) 4.75 Å, 46 and the latter orthorhombic (staggered packing), with M-M ) 3.44 Å. 45,47 The preparation determines which modification is obtained, with fast precipitation from reactants favoring the orange β phase and slow recrystallization from chloroform favoring the red R phase.…”

Section: Resultsmentioning

confidence: 99%

Variations on Nickel Complexes of the vic-Dioximes: An Understanding of Factors Affecting Volatility toward Improved Precursors for Metal−Organic Chemical Vapor Deposition of Nickel

et al. 1998

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The vic-dioxime complexes bis(2,3-butanedionedioximato)nickel(II), Ni(dmg) 2 ; bis(3,4hexanedionedioximato)nickel(II), Ni(deg) 2 ; bis(4,5-octanedionedioximato)nickel(II), Ni(dpg) 2 ; bis(ethanedialdioximato)nickel(II), Ni(g) 2 ; bis(1,2-diphenylethanedionedioximato)nickel(II), Ni(dbg) 2 ; bis(1,2-cyclohexanedionedioximato)nickel(II), Ni(nox) 2 ; and bis(2,3-pentanedionedioximato)nickel(II), Ni(meg) 2 , were prepared. Their volatilities were compared under ambient and reduced pressure using thermogravimetry. Ni(deg) 2 and Ni(dpg) 2 were the most volatile, and the variation in volatility of each complex was explained on the basis of ligand effects, crystal packing, and nickel-nickel distances using solid-state electronic spectra. The crystal structure of Ni(dpg) 2 was determined for the first time: monoclinic crystal system, C2/c space group. The complex packs in pairs related by the c-glide plane symmetry. Short intrapair distances of 3.312(2) Å are observed between Ni and N with short and long Ni-Ni distances of 3.2044(5) and 5.7964(5) Å, respectively. Metal-organic chemical vapor deposition (MOCVD) experiments were conducted using Ni(deg) 2 as precursor in a vertical cold-walled reactor. The precursor transport and film growth behavior, morphology, and composition have been examined. Pure films could be grown between 350 and 400 °C in helium. Growth rates were greater with additional hydrogen, but the films were heavily contaminated with carbon. The difference in growth rates and film morphology for the different reactor conditions was investigated.

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“…This effect increases the Ni···Ni distance to 3.8 and above, and can be exemplified by the Ni complex of glyoxime itself, in which the Ni···Ni distance is 4.210 (NIGLOX01 and 10). [55] One derivative, [NiA C H T U N G T R E N N U N G (emg) 2 ] (emg = ethyl-methyl-glyoximato), exhibits polymorphism, the a form crystallizing with a slipped stacking interaction and a Ni···Ni distance of 4.750 (NIMEGL01), [56] whereas the rarer b form crystallizes with parallel stacks and a Ni···Ni distance of about 3.4 . [57] The effect of pressure on the crystal structure of [Ni-A C H T U N G T R E N N U N G (dmg) 2 ] has been studied up to 7.4 GPa by X-ray powder diffraction; [51] the similarity of the bulk moduli of this mate-rial with those of 1F was referred to above.…”

Section: Discussionmentioning

confidence: 99%

“…One derivative, [Ni(emg) 2 ] (emg=ethyl‐methyl‐glyoximato), exhibits polymorphism, the α form crystallizing with a slipped stacking interaction and a Ni⋅⋅⋅Ni distance of 4.750 Å (NIMEGL01),56 whereas the rarer β form crystallizes with parallel stacks and a Ni⋅⋅⋅Ni distance of about 3.4 Å 57…”

Section: Discussionmentioning

confidence: 99%

Piezochromism in Nickel Salicylaldoximato Complexes: Tuning Crystal‐Field Splitting with High Pressure

Byrne

Richardson

Chang

et al. 2012

Chemistry A European J

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The crystal structures of bis(3-fluoro-salicylaldoximato)nickel(II) and bis(3-methoxy-salicylaldoximato)nickel(II) have been determined at room temperature between ambient pressure and approximately 6 GPa. The principal effect of pressure is to reduce intermolecular contact distances. In the fluoro system molecules are stacked, and the Ni⋅⋅⋅Ni distance decreases from 3.19 Å at ambient pressure to 2.82 Å at 5.4 GPa. These data are similar to those observed in bis(dimethylglyoximato)nickel(II) over a similar pressure range, though contrary to that system, and in spite of their structural similarity, the salicyloximato does not become conducting at high pressure. Ni-ligand distances also shorten, on average by 0.017 and 0.011 Å for the fluoro and methoxy complexes, respectively. Bond compression is small if the bond in question is directed towards an interstitial void. A band at 620 nm, which occurs in the visible spectrum of each derivative, can be assigned to a transition to an antibonding molecular orbital based on the metal 3d(x(2)-y(2)) orbital. Time-dependent density functional theory calculations show that the energy of this orbital is sensitive to pressure, increasing in energy as the Ni-ligand distances are compressed, and consequently increasing the energy of the transition. The resulting blueshift of the UV-visible band leads to piezochromism, and crystals of both complexes, which are green at ambient pressure, become red at 5 GPa.

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A redetermination of the crystal and molecular structure of nickel(II) ethylmethylglyoxime

Cited by 27 publications

References 8 publications

The crystal and molecular structure of bisanilinebis(dimethylglyoximato)cobalt(III) chloride

The crystal and molecular structure of bisanilinebis(dimethylglyoximato)cobalt(III) chloride

Variations on Nickel Complexes of the vic-Dioximes: An Understanding of Factors Affecting Volatility toward Improved Precursors for Metal−Organic Chemical Vapor Deposition of Nickel

Piezochromism in Nickel Salicylaldoximato Complexes: Tuning Crystal‐Field Splitting with High Pressure

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