General Catalogue Chemistry - BECO Internacional LTDA.

The atomic models after Stuart and Briegleb
serve to illustrate the true steric configuration of
molecular models with covalent bonds - primarily
in the field of organic chemistry. Being spatial
components reflecting in correct proportions
the distances between the atoms, these models
are of significance both inresearch and in school
instruction at the upper grade levels.
The atomic models illustrate the sphere of
action of the individual atoms in covalent
bonds at magnification of 1.5 x 10 8 .
A distance of 15 cm in a molecule assembled
from the atomic thus corresponds to a distance
of 10 Å = 1 nm = 10 -9 m in the actual molecule.
The shapes and dimensions of the models have
been selected in accordance with the latest findings
and have been chosen so as to represent
the various methods for calculating these values;
they compensate for deviations which may appear
in the internuclear spacings and in the
valence angles in ring compounds, for instance.
The possibilities for assembling organic compounds
are virtually unlimited ranging form the
simple ethanol model through to representation
of the haemin-iron complex.
660 788
Cat. No. Description Color 660 788 660 782
660 700
660 701
660 705
660 706
660 707
660 708
660 710
660 711
660 712
660 713
660 714
660 715
660 718
660 719
660 730
660 731
660 782
660 788
Set of atomic models, S,
for schools
Hydrogen white 14 30
Hydrogen bridge white 10
Fluorine dark yellow 4
Chlorine green 3 4
Bromine brown 4
Iodine
C-aliphatic
violett 4
black 6 12
C-ethylene
C-aromatic
black 4 8
C-aromatic, condensed
black 6 10
C-5 ring, saturated
black 2
C-5 ring, unsaturated
black 5
black 4
C-allene black 2
C-acetylene black 2
Nitrogen amino blue 2 2
Nitrogen azo blue 2
Used to represent more than 150 aliphatic,
aromatic and cyclic compounds.
660 782
illustrative media
Illustrative media
Atomic models after Stuart and Briegleb
660 732
660 733
660 735
660 750
660 751
660 755
660 756
660 764
660 765
660 766
660 770
660 776
Accessories
660 790
660 791
660 796
Set of atomic models, C,
for larger organic structures
Sufficient to satisfy most requirements in regard
to the structures to be illustrated.
Cat. No. Description Color 660 788 660 782
Nitrogen aromatic blue 2
Nitrogen group red/blue 1 2
Nitrogen -5 ring, unsaturated blue 2
Oxygen, carbonyl red 2 4
Oxygen, ether red 6 6
Sulfur, sulfane yellow 2
Sulfur, thiophene
Phosphorus, tetrahedral
Phosphorus-oxygen group
yellow
light brown
1
Sulfone group
red/light brown
red/yellow
Metal, planar, covalent silver-bronze
Aluminium silver-bronze
Set of 10 dual bonds
(metal) 2 11
Set of 10 clamping springs 2 3
Ejector for dual bonds connectors 1 1
LEYBOLD DIDACTIC · GENERAL CATALOGUE CHEMISTRY
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