General Catalogue Chemistry - BECO Internacional LTDA.

Cat. No
and description C-arom. C-arom, kond. C-5 ring, sat. C-5 ring, unsat.
Atomic symbol
Sectional view
660 712
660 713
Twin model as Carbon for unsaturated
Use Carbon for intermediate piece for Carbon for saturated five-membered rings, also
aromatic compounds assembling condensed five-membered rings for use in condensed
aromatic ring systems ring systems
Effective radii r� and r� r� = 1.9 cm r� = 1.9 cm r� = 1.9 cm r� = 1.9 cm
r� = 2.4 cm r� = 2.4 cm r� = 2.4 cm
Calotte height h h1 = 3.1 cm h1 = 3.1 cm h = 3.1 cm h1 = 3.1 cm
h2 = 4.8 cm h2 = 4.8 cm h2 = 4.8 cm
Valance angle �; �; �; � � = � = � = 120° � = 120° � = 108°, � = 110°, � = 106°, � = 120°,
� = 110° � = 134°
Color black black Black, side faces Black, side faces
between � and � yellow between � and � yellow
Cat. No
660 714
illustrative media
and description C-allene C-acetylene N-amino N-azo
Atomic symbol
Sectional view
660 718
660 719
Carbon for Nitrogen for amino
Nitrogen for
azo and diazo
Use making allene Carbon for groups, hydrazines, compounds, imidoether,
compounds acetylene hydroxylamines, hydrazide amidines, guanidines,
and ketenes oximes, imines
660 715
Effective radii r� and r� r� = 1.9 cm r� = 2.4 cm r� = 2.0 cm r� = 1.9 cm
r� = 2.4 cm r� = 2.4 cm
Calotte height h h1 = 3.1 cm h = 2.0 cm h = 3.0 cm h1 = 3.1 cm
h2 = 4.8 cm h2 = 4.8 cm
Valance angle �; �; �; � � = 180° � = 180° � = � = � = 110° � = 120°
Color black black blue blue with slot and eyelet
for hydrogen bridge bond
660 730
660 731
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