The crystal and molecular structure of endo,endo-2,6-diphenacyl[4]peristylane
Abstract
The crystal and molecular structure of endo,endo-2,6-diphenacyl-[4]peristylane has been determined by X-ray diffraction techniques. The compound crystallizes in the orthorhombic space group Pbca having cell parameters a = 8.662(5), b = 19.75(1), c = 24.10(2) Å and eight molecules per unit cell.
The crystal structure was determined by direct methods. The refinement by a block-diagonal least-squares method led to a final R-value of 0.08 for 2272 observed reflections.
The molecule deviates considerably from C2-symmetry. The fourmembered ring contains a single long C–C bond of 1.58(2) Å. Within the crystal structure the two side chains are pointing outwards from the molecule which explains why the excited state 4 → 5 transformation does not work. The molecules are held together by van der Waals forces.
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Articles in the same Issue
- The thermal expansion of Na2CO3
- Crystal structure of a beryllium-potassium polyphosphate: BeK(PO3)3
- 4-Amino-2-bromo-6-methyl-5,6,7,8-tetrahydropyrido[2,3-d]-pyrimidine
- An X-ray analysis of anomalous dispersion effects, anharmonicity and thermal vibrations in gallium phosphide
- An empirical model of optical susceptibilities of crystals I. Refractivity in alkali halides
- An empirical model of optical susceptibilities of crystals II. Elasto-optical effect in alkali halides
- Refinements of Ag3AsSe3 based on high-order thermal-motion tensors
- Crystal and molecular structure of α-naphthil
- The crystal and molecular structure of endo,endo-2,6-diphenacyl[4]peristylane
- Ancient oriental pattern and related zeolite type networks
- The crystal structure of saleeite, Mg[UO2PO4]2 · 10H2O
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- Structure of 2,7-dihydro-3,5,8-trimethylazuleno (6-5-b) furan-2,7-dione
- Die isotypen Phasen HEF6 · 5H2O · HF (E = P, As, Sb): Neubestimmung der Strukturen an Einkristallen1
- Crystal structure of a mixed crystal containing 3-benzoyl-2-phenyl-furo[2,3-b]quinoxaline and 3-benzoyl-2-phenyl-thieno[2,3-b]quinoxaline
- Splitpositionen für Alkalimetallkationen in den Thioindaten MIn5S8 (M = K, Rb, Cs)?
- Crystal structure of E-2-styrylquinoline(STQ), C17H13N
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- 10.1515/zkri.1986.177.3-4.165
- 10.1515/zkri.1986.177.3-4.171
- 10.1515/zkri.1986.177.3-4.177
- 10.1515/zkri.1986.177.3-4.185
- 10.1515/zkri.1986.177.3-4.201
- 10.1515/zkri.1986.177.3-4.211
- 10.1515/zkri.1986.177.3-4.219
- 10.1515/zkri.1986.177.3-4.229
- 10.1515/zkri.1986.177.3-4.237
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