Journal ArticleDOI
THE CRYSTAL STRUCTURE OF 8,16-OXIDO--cis(2,2)-METACYCLOPHANE-1,9-DIENE,
A. W. Hanson,K. Huml +1 more
TLDR
In this article, a crystal structure analysis of 8,16-oxido-cis(2.2)metacyclophane-1,9-diene has been carried out at -160C.Abstract:
: A crystal structure analysis of 8,16-oxido-cis(2.2)metacyclophane-1,9-diene has been carried out at -160C. The crystal is orthorhombic, Pbca, with a=11.96, b=17.13, c=10.67 A, Z=8, formula C16H10O. The structure was determined by computer-programmed symbolic addition procedures, and was refined by block-diagonal least-squares to a conventional R index of 0.069. Within the limits of experimental error the molecule has mm symmetry. It is folded to a dihedral form so that the angle between the six-membered rings is 123.6. Strain is inferred from the nonplanarity of these rings. The bond angle subtended by the oxygen atom is 99.7, and the length of the double bond in the C-C bridge is 1.359 A. (Author)read more
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Journal ArticleDOI
Transannulare π-π-Wechselwirkung in Cyclophanen
Roberto Boschi,Werner Schmidt +1 more
Journal ArticleDOI
Single Crystal Structure of Zeolite A (LTA) Containing Ag 4Cl 4 Nanoclusters and Reduced 1,3,5-Tripyrylium Dimers with Remarkably Short 2.43 Å Interplanar Spacings
Seok Kim,Thanh Nga Nguyen Thi,Nam Ho Heo,Ghyung Hwa Kim,Suk Bong Hong,John D. Head,Karl Seff +6 more
TL;DR: In this paper, a single crystal of Ag 12−A (zeolite LTA) was prepared by the dynamic ion exchange of Na12−A with aqueous 0.05 M KCl in CH 3OH at 294 K.
Journal ArticleDOI
The Crystal and Molecular Structure of 4,10b-Methano-8H-benzo[ab]cyclodecen-8-one
TL;DR: In this article, a stable derivative of 1,6-methano[10]annulene, called C14H10O, is presented, with eight molecules in a unit cell with dimensions of a=16.567, b=14.090, and c=8.418 A. The final R factor was 0.080 for the 1386 independent observed reflections.
Journal ArticleDOI
Kristall‐ und Molekularstruktur von zwei [3.2]Cyclophanen: [2.0.0](1,4)Benzeno(1,8)naphthalino(1,4)benzenophan und [2.0.0](1,3)Benzeno(1,8)naphthalino(1,3)benzenophan
TL;DR: Benzeno et al. as mentioned in this paper showed boat-like deformations of the phenylene rings of two cyclophane derivatives bridged by a 1,8-naphthalino and an ethano group.
References
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