## Over the pwtbmyems successfulattemptshavebeenmade to prepare stablederivatives of \*cycb&mpenyli.d~-cyc~iene (calico) systm. Thi8paper~fm~tiegrelimim.q results af an X-ray cry6talkgraphic sMy of 1,2,3,4-t-5,6~ipleql~licene (I) using
The ground state properties of 1,2,3,4-tetrachloro-5,6-diphenylcalicene
β Scribed by Ichiro Murata; Masako Ueno; Yoshio Kitahara; Haruyuki Watanabe
- Publisher
- Elsevier Science
- Year
- 1966
- Tongue
- French
- Weight
- 246 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
β¦ Synopsis
In the previous paper (1) we have reported the synthesis and some properties of 1,2,3,4-tetraohloro-fi,bdlphenyloalloene (I).
Theoretloal oonslderatlons (2) have predloted that the oalloene system (II) would have a stable.olosed-shell eleotronlo oonflguratlon and that the dlpolar resonanoe struoture (IIa) would make au unusually large oontrlbutlon to Its ground state due to a oharge transfer from the eleotron-donatlng threemembered ring towards the eleotron-aooeptlng five-membered ring.
Very reoently, however, Dewar and Gleloher (3) have reported the oaloulatlons for oalloene and Its beneo derivatives by the semll To whom oommunloatlons should be addressed.
π SIMILAR VOLUMES
Halogen-metal exchange with n-BuLi; systems, e.g. Sulphur-c\_ontaining polychloroheterocyclic 4,6,7-trichloro-3-methylthienob,2\_dpyridine G. He inrich u. H. Hoffmeister, I. tied. Univ.-Klinik, Hamburg. Polypodium B, ein Steroid nit Insektenhtiutungshormon-Eigenschaften, isolierten JIZBA u. Mitarb.
In connection with other work it became necessary for us to prepare 2,3,6-trichloro-4-β’ercaptopyridine (II). A sulphur atom in organosulphur compounds, such as thiophens (1) and benzo[&]thiophens (2), is known to be capable of complexing with n-butyl-lithium, and it seemed, therefore, ihat reaction