Dome model

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Filling model of formic acid .
Dome model of octane .
Space-filling model of the peptide - the hormone angiotensin I from experimental NMR -Strukturdaten. PDB  1N9U .

The dome model - like the rod model and the ribbon model - is one of the three-dimensional molecular models that are used to illustrate the structure of molecules in three dimensions .

description

The dome model developed in 1934 by the Swiss physicist Herbert Arthur Stuart is a further development of the rod model , with which the structure of molecules can be represented in three dimensions. The atoms of the individual elements are represented by spherical cutouts of different colors ( spherical caps ). The relationships between the atomic sizes, bond angles and bond lengths correspond to the actual relationships. The former are determined by the van der Waals radii of the individual atoms. The result is a clear and (depending on the kit and version) movable model of the molecule. The dome models are manufactured and sold by the Leybold company to this day.

In 1937, in the USA, J. Hirschfelder developed a lower-priced dome model than the one marketed by Fisher Scientific. In the early 1950s, L. Pauling and RB Corey developed their own dome model, which W. Koltun improved and which became known as the CPK model .

The representation of molecules as a space-filling model is also supported by many 3D structural programs.

Coloring

The atoms are colored according to the CPK model.

Coloring
atom colour
hydrogen White
carbon black or gray
nitrogen blue
oxygen red
phosphorus orange
sulfur yellow
chlorine green

swell

  1. ↑ Herbert Arthur Stuart (1934): About new molecular models. In: Journal for Physical Chemistry (B). Vol. 27, pp. 350-358.
  2. ^ Robert B. Corey & Linus Pauling (1953): Molecular Models of Amino Acids, Peptides, and Proteins. In: Review of Scientific Instruments. Vol. 24, No. 8, pp. 621-627. PDF
  3. ^ Walter L. Koltun (1965): Precision space-filling atomic models. In: Biopolymers. Vol. 3, No. 6, pp. 665-679. PMID 4158989 doi : 10.1002 / bip.360030606

literature

  • Egbert Keller: Kalottenmodelle In: Chemistry in our time, 14th year 1980, No. 2, pp. 56-60, ISSN  0009-2851
  • Eric Francoeur (1997): The Forgotten Tool: The Design and Use of Molecular Models. In: Social Studies of Science. Vol. 27, No. 1, pp. 7-40. doi : 10.1177 / 030631297027001002

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