Isomerism of benzoquinone-monoximes (nitrosophenols). XI. The crystal structure of β-2-chloro-p-benzoquinone-4-oxime acetate

Fischmann, E.; MacGillavry, C. H.; Romers, C.

doi:10.1107/s0365110x61002278

Cited by 8 publications

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“…The sharpening function used here and in the above section was s z exp (-0.17sZ), where s=2 sin 0 (Fischman, MacGillavry & Romers, 1961). Grid intervals of 50ths along a, 30ths along b and 40ths along e were used, with no interpolation between grid points in the superposition routine.…”

Section: Superposition Methodsmentioning

confidence: 99%

The crystal and molecular structure of pyridoxal phosphate oxime

Barrett¹,

Palmer²

1969

Acta Crystallogr Sect B

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The crystal structure of pyridoxal phosphate oxime (CsHI1N206P) has been determined by X-ray single-crystal analysis, and refined by block-diagonal least-squares methods to an R value of 11%o. The molecule is planar, with the exception of the phosphate group, and the structure is governed by a complex system of hydrogen bonds. Two of the P-O bonds are normal; the other two, both involved in hydrogen bonding, are abnormally short with bond lengths of 1.48 A and 1-46 A respectively. Three methods of preliminary structure determination, symbolic addition, heavy-atom technique, and machine Patterson-superposition, are compared.

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Section: Superposition Methodsmentioning

confidence: 99%

The crystal and molecular structure of pyridoxal phosphate oxime

Barrett¹,

Palmer²

1969

Acta Crystallogr Sect B

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Structural Evidence for Bent Orbitals

Hirshfeld

1964

Israel Journal of Chemistry

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In a non-linear molecule RXR' steric repulsion between Rand R' frequently causes the bond angle at X to be larger than the angle between the orbitals of this atom that participate in the XR and XR' bonds. These bondi are then bent. Thus the atomic orbital on R does not point directly towards atom X but is inclined at some angle to the bond axis. If R is a polyatomic group havtng an axis of symmetry, this axis will be similarly inclined to the R-X bond. This effect accounts for structural anomalies that have been observed in compounds such as dimethyl ether (X = 0, R = R' = CHy formaldoxime (X = N, R = 012, R' =OH) and many others.

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1960 - 1964

Schudt¹,

Weitz²

Structure Data of Organic Crystals

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Isomerism of benzoquinone-monoximes (nitrosophenols). XI. The crystal structure of β-2-chloro-p-benzoquinone-4-oxime acetate

Cited by 8 publications

References 0 publications

The crystal and molecular structure of pyridoxal phosphate oxime

The crystal and molecular structure of pyridoxal phosphate oxime

Structural Evidence for Bent Orbitals

1960 - 1964

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