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Chemical Name


ethyne dimer (C4H4)

Compound Descriptions:

Structure Drawing
Formula:C4H4
Molecular Weight:52.075 g/mol
Name(s):ethyne dimer
Cyclobutadien
Cyclobutadiene
1,3-Cyclobutadiene
[4]Annulene
CAS-RN:1120-53-2
Classification:no charge; carbocycle; 4ring; 1fragment

Landolt-Börnstein Citations:

Magnetic Properties

 Diamagnetic Susceptibility: Vol. II/27b 7.1.4:248II/27B
 Magnetic susceptibility exaltation data: Vol. II/27c 10.2:44II/27C
 Magnetic anisotropy data: Vol. II/27c 11.3:120II/27C

Structure and Molecular Constants

 Molecular Constants Mostly From Microwave, Molecular Beam, Electro Spin Resonance and Sub-Doppler Laser Spectroscopy: Vol. II/19b 2.5.2:362II/19b
 Theoretical Structures of Molecules: Vol. II/22b 2:155II/22b

References

II/19b
Short: II/19b
Title: Molecular Constants: Rotational, Centrifugal Distortion and Related Constants of Diamagnetic Asymmetric Top Molecules
Author: Demaison, J.; Hüttner, W.; Vogt, J.; Wlodarczak, G.
Editor: Hüttner, W.
Source: Landolt-Börnstein, New Series
Volume: II/19b
Year: 1992
Keyword: organic compounds; molecular constants; spectroscopy; microwave spectroscopy
ISBN: 3-540-54578-6
ISBN: 978-3-540-54578-1
Internet Resource: DOI:10.1007/b44334
RefComment: XI, 488 pages.
Abstract: Volume II/19 Molecular Constants mostly from Microwave, Molecular Beam and Sub-Doppler Laser Spectroscopy is a supplement to the earlier volumes II/4, II/6, and II/14. The slight change in the title reflects current trends in the applications of spectroscopic methods. Together, the four volumes collect all the critically evaluated data published up to 1989/90 on constants of free molecules obtained by classical and modern spectroscopy. Volume II/19 is divided into four parts to record the growing number of investigations, especially in the microwave and millimeter wave regions, where modern techniques like Fourier Transform Microwave Spectroscopy have made new objects of interest such as molecular complexes and clusters accessible to study. Subvolume II/19b contains corresponding data on diamagnetic asymmetric top molecules.
II/22b
Short: II/22b
Title: Theoretical Structures of Molecules: Small Rings
Author: Hampel, F.
Editor: von Ragué Schleyer, P.
Source: Landolt-Börnstein, New Series
Volume: II/22b
Year: 1994
ISBN: 3-540-56332-6
ISBN: 978-3-540-56332-7
Internet Resource: DOI:10.1007/b48044
RefComment: VIII, 160 pages. Hardcover
Abstract: Volume II/22 presents computed geometries. Quantum chemical computations provide an excellent alternative to experimental methods for the determination of accurate structures of polyatomic molecules. The objective is not to duplicate, but rather to complement the existing literature. An advantage of computational chemistry over experimental methods is the possi-bility to obtain reliable geometries of molecules, even of important systems, which are difficult to synthesize, isolate, and to study experimentally.
II/27B
Short: II/27B
Title: Diamagnetic Susceptibility of Organic Compounds, Oils, Paraffins and Polyethylenes
Author: Kumar, M.; Gupta, R.
Editor: Gupta, Radha Raman
Source: Landolt-Börnstein, New Series
Volume: II/27B
Year: 2008
Keyword: diamagnetic susceptibility; organic compounds
ISBN: 978-3-540-44359-9 (print)
ISBN: 978-3-540-45860-9 (online)
Internet Resource: doi:10.1007/978-3-540-45860-9
RefComment: VIII, 503 p. With CD-ROM., Hardcover
RefComment: Written for: Scientists and researchers in the fields of physics, chemistry, materials science
RefComment: Supplement and Revised Editon to II/16
Abstract: The volume II/27 has been divided into three subvolumes according to the classes of compounds: Subvolume A: Diamagnetic susceptibility and magnetic anisotropy of inorganic and organometallic compounds; Subvolume B: Diamagnetic susceptibility of organic compounds, oils, paraffins and polyethylenes; Subvolume C: Diamagnetic susceptibility and magnetic anisotropy of organic compounds. The data presented in this volume are based on the literature survey of the chemical abstracts up to 2005. The calculated values of diamagnetic susceptibility of organic compounds in the present subvolume II/27B are presented along with their experimental values. They have been calculated with the use of structural parameters in structural formula by using different theoretical methods available in the literature.
II/27C
Short: II/27C
Title: Diamagnetic Susceptibility and Magnetic Anisotropy of Organic Compounds
Author: Kumar, Mahendra; Gupta, Rajni
Editor: Gupta, Radha Raman
Source: Landolt-Börnstein, New Series
Volume: II/27C
Year: 2008
Keyword: diamagnetic susceptibility; magnetic anisotropy; organic compounds
ISBN: 978-3-540-44734-4 (print)
ISBN: 978-3-540-44736-8 (online)
Internet Resource: doi:10.1007/978-3-540-44736-8
RefComment: VIII, 204 p., Hardcover
RefComment: Written for: Scientists and researchers in the fields of physics, chemistry, materials science
RefComment: Supplement and Revised Editon to II/16
Abstract: The volume II/27 has been divided into three subvolumes according to the classes of compounds: Subvolume A: Diamagnetic susceptibility and magnetic anisotropy of inorganic and organometallic compounds; Subvolume B: Diamagnetic susceptibility of organic compounds (Part 1); Subvolume C: Diamagnetic susceptibility and magnetic anisotropy of organic compounds (Part 2). The data presented in this volume are based on the literature survey of the chemical abstracts up to 2005.

  File created on 2009/18/08 by LCI Publisher GmbH (Gaja Peters, Inga Thede, Volkmar Vill, Ron Zenczykowski)
  © 2009   Landolt Börnstein,   Springer-Verlag Berlin Heidelberg