一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

ChemicalBook >> journal list >> Journal of Molecular Structure >>article
Journal of Molecular Structure

Journal of Molecular Structure

IF: 4
Download PDF

The molecular structure of gaseous tetrachloro-p-benzoquinone and tetrachloro-o-benzoquinone by electron diffraction

Published:1 October 1978 DOI: 10.1016/0022-2860(78)87273-1
Kolbj?rn Hagen, Kenneth Hedberg

Abstract

The structures of tetrachloro-p-benzoquinone and tetrachloro-o-benzoquinone (p- and o-chloranil) have been investigated by gas electron diffraction. The ring distances are slightly larger and the carbonyl bonds slightly smaller than in the corresponding unsubstituted quinones. The molecules are planar to within experimental error, but small deviations from planarity such as those found for the para compound in the crystal are completely compatible with the data. Values for the geometrical parameters (ra distances and bond angles) and for some of the more important amplitudes (l) with parenthesized uncertainties of 2σ including estimated systematic error and correlation effects are as follows. Tetrachloro-p-benzoquinone: D2h symmetry (assumed); r(CO) = 1.216 ?(4), r(CC) = 1.353 ?(6), r(C-C) = 1.492 ?(3), r(C-Cl) = 1.701 ?(3), ∠C-C-C = 117.1° (7), ∠CC-C1 = 122.7° (2), l(CO)= 0.037 ?(5), l(CC) = l(C-C) - 0.008 ?(assumed) = 0.049 ?(7), and l(C-Cl) = 0.054 ?(3). Tetrachloro-o-benzoquinone: C2v symmetry (assumed); r(CO) = 1.205 ?(5), r(CC) = 1.354 ?(9), r(Ccl-Ccl) = 1.478 ?(28), r(Co-Ccl) = 1.483 ?(24), r(Co-Co) = 1.526 ?(2), r(C-Cl)= 1.705 ?(3), <Co-CO = 121.0° (22), ∠C-C-C = 117.2° (9), ∠Cco, ClC-Cl = 118.9° (22), ∠Cccl, ClC-Cl = 122.2°(12), l(CO) = 0.039 ?(5), and l(Ccl-Ccl) = l(Co-Ccl) = l( Co-Co) = l(CC) + 0.060 ?(equalities assumed) = 0.055 ?(9). Vibrational'shortenings (shrinkages) of a few of the long non-bond distances have also been measured.

Substances (2)

Related products
Procduct Name CAS Molecular Formula Supplier Price
Chloranil 118-75-2 C6Cl4O2 609 suppliers $10.00-$4094.90
Tetrachloro-o-benzoquinone 2435-53-2 C6Cl4O2 170 suppliers $24.00-$1292.00

Similar articles

IF:0

Kinetics and mechanism of the addition of triphenylphosphoniocyclopentadienide to tetrachloro-p-benzoquinone

Journal of The Chemical Society-perkin Transactions 1 F. P. Plá,?J. Palou,etc Published: 1 January 1991
IF:1.4

The REMPI spectra of o-, m- and p-bromofluorobenzene and the photodissociation of p-bromofluorobenzene

Journal of Molecular Spectroscopy Chen Qin , Jian Wang ,etc Published: 1 March 2012
IF:0

The structure of p-toluic acid

Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry M. G. Takwale,?L. Pant,etc Published: 15 June 1971
邹城市| 沈阳市| 威信县| 高陵县| 博爱县| 公主岭市| 蛟河市| 商城县| 故城县| 社会| 信宜市| 泗洪县| 龙岩市| 焦作市| 夹江县| 乡宁县| 通辽市| 临江市| 平阳县| 蛟河市| 杭锦旗| 门源| 平凉市| 临洮县| 井陉县| 富川| 隆子县| 连平县| 九江市| 喀喇沁旗| 柯坪县| 河东区| 察隅县| 洛宁县| 依安县| 申扎县| 仙桃市| 连江县| 确山县| 双江| 焦作市|