Synthesis of Trihalocyclopropenium Salts and Normal Coordinate Analysis of C₃Cl₃⁺

Abstract

for constructing the special Raman tubes used. Mr. Edward Chait of the Chemistry Department of Purdue University obtained the mass spectral data reported herein.

Aromatic and Alkaromatic Chlorocarbons

“…The preparation of salts of the perchlorocyclopropenium ion (CCLXIV) has been effected by West and co-workers from perchlorocyclopropene, by the action of Lewis acids such as aluminium, ferric, gallium or antimony chlorides [354,[365][366][367]. l1 L a +A ~ aAa Aa-…”

“…Its infrared and Raman spectra have been reported [366]. The carbonium ion (CCLXIV) is not appreciably bonded to its counter-ion and, therefore, belongs to the D3 h symmetry species, i.e., its three carbon atoms are at the corners of an equilateral triangle.…”

The crystal and molecular structure of 1,2,3,4-tetrachloro-5,6-di-n-propylcalicene

“…If this is the case the extent of bending in the present compound should be larger than that in cyclopropane, because of the larger s-characters of the carbon orbitals in the former. The repulsions in such a deformed a framework may not be so much increased with shortening of the C-C distance, because the limit on approach of adjacent carbon atoms may result from repulsive interactions involving a-bonding electrons (West, Sado & Tobey, 1966). The shortening of the C-C distance undoubtedly results in increasing overlap of the carbon p-orbitals.…”

Symmetrical and Asymmetrical Cyclopropenones: Synthesis and Study of Their Chemical Reactivity

“…The first cyclopropenilium cation, namely triphenylcyclopropenium, was synthesized and described by Breslow and coworkers in 1957 [1], and shortly after that the corresponding diphenylcyclopropenone was obtained [2]. Nowadays, numerous investigations have been carried out with this class of cations [3], and in the last years they were prepared by various routes [3][4][5][6][7][8]. The diarylcyclopropenone 2 was obtained after hydrolysis of the products of alkylation obtained by the reaction of benzene or benzene derivatives with trichloro cyclopropenium tetrachloroaluminate (1) (Equation 1) [6].…”