The correlation of intersecting layers of X-ray intensity data

Rollett, J. S.; Sparks, R. A.

doi:10.1107/s0365110x60000625

Cited by 82 publications

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“…No absorption correction was applied. The common reflexions measured about the two axes were used to put the data on a common scale by the method of Rollett & Sparks (1960). 1484 independent reflexions wele observed.…”

Section: Methodsmentioning

confidence: 99%

Crystal and molecular structure of 2-aminoadamantane-2-carboxylic acid hydrobromide

Chacko¹,

Zand²

1973

Acta Crystallogr Sect B

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2-Aminoadamantane-2-carboxylic acid hydrobromide crystallizes in space group P21/c with a= 6.40, b= 11"62 and c= 15.38 ,~, fl= 95.2 °, Z=4. The structure was solved by the heavy-atom method with 1484 visual reflexions and refined to an R of 0.097. The substitution of the amino and the carboxyl group at C(2) of the adamantane does not significantly affect its highly symmetric cage-hke structure.In relation to amino acid structures, a rare occurrence of the C(11)-O(2) double bond trans to the nitrogen N about the C(2)-C(11) bond is observed in this structure. The nitrogen atom lies 1.07 A oat of the plane containing the carboxyl group and C(2).

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Section: Methodsmentioning

confidence: 99%

Crystal and molecular structure of 2-aminoadamantane-2-carboxylic acid hydrobromide

Chacko¹,

Zand²

1973

Acta Crystallogr Sect B

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“…No absorption correction was used since the samples were small (mean radii: 0.05 and 0-07 mm). After correction for Lorentz and polarization factors, the intensities were placed on the same relative scale (Rollett & Sparks, 1960) and the absolute scale was established by Wilson's (1942) method.…”

Section: Introductionmentioning

confidence: 99%

The crystal and molecular structure of 3-(2-diethylammoniumethoxy)-1,2-benzisothiazole tetrachlorocuprate

Bonamartini¹,

Nardelli²,

Palmieri³

et al. 1971

Acta Crystallogr Sect B

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“…Geometrical corrections were applied, and all the intensities were converted into structure amplitudes and placed on a common scale by the least-squares method described by Rollett & Sparks (1960). Unobserved reflexions were included by taking one half of the minimum observed intensity.…”

Section: Methodsmentioning

confidence: 99%

The crystal structure of monobromodehydrobispulegone

Franco¹,

Martínez-Carrera²,

García-Blanco³

1974

Acta Crystallogr Sect B

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Crystals of monobromodehydrobispulegone, C20H27BrO, are orthorhombic, space group P2~2121, with four molecules per unit cell. The lattice constants are: a = 11.656 (2), b = 11.669 (2), c = 12.766 (2)/~. The crystal structure has been solved by the heavy-atom technique and refined by the full-matrix least-squares method. The final R index for 692 independent observed reflexions is 0.107. The molecule shows stress in the pentagonal ring. In the cyclohexane ring the oxygen and bromine substituents appear to be coplanar and the methyl substituent is in an axial position. The molecular packing shows no remarkable directional features.

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The correlation of intersecting layers of X-ray intensity data

Cited by 82 publications

References 0 publications

Crystal and molecular structure of 2-aminoadamantane-2-carboxylic acid hydrobromide

Crystal and molecular structure of 2-aminoadamantane-2-carboxylic acid hydrobromide

The crystal and molecular structure of 3-(2-diethylammoniumethoxy)-1,2-benzisothiazole tetrachlorocuprate

The crystal structure of monobromodehydrobispulegone

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