sample preparation - Harvard Apparatus UK

individual atoms
Nitrogen Atoms
Nitrogen Atoms
Covalent Radii, Å
Bond
van der
Atom Species Order # Arrangement Color Bond Angle Waals Radii, Å Single Bond Double Bond Triple Bond
N-Tetrahedral* SP1 67-6841 Blue 109°30' – 0.70 – –
N
N-Nitrile SP1 67-6792 Blue 180° 1.60 0.70 – 0.60
Triple Bond
N
N-Aromatic-6* SP1 67-6833 Blue 120° 1.70 0.73 0.69 –
N
(partial)
N-Aromatic-5* SP1 67-6825 Blue 108° 1.70 0.73 0.68 –
N
126° (partial)
N-Tetrahedral-4 SP1 67-6858 Blue 114° 112° 1.25 0.76 – –
114° 88° 0.77
N
N-Trigonal-4 SP1 67-6866 Blue 134° 92° 1.48 0.73 0.65 –
134° 0.7
N
N-Amide* SP1 67-6791 Blue 123° 114° 1.45 0.70 0.60 –
N
123° 0.70 (partial)
Amine Cap SP1 67-7112 – Blue – – – – –
* For nitrogen conversion, see SP1 67–7112 Amine Cap on page 67.
Nitrogen, Nitrile Triple Bond
Covalent radius 0.60Å along triple bond;
this face marked ‘C∫’ for triple bonding
with SP1 67-6593 Carbon, Acetylenic Triple
Bond to form nitriles or ‘cyano’
compounds; second socket notched to
accept restricted rotation connectors. Covalent radius 0.70Å
along single bond. Blue.
Order #
SP1 67-6792
Nitrogen, Tetrahedral
Connector sockets notched for simulation
of restricted rotational potential. Covalent
radius 0.70Å; bond angle 109°30’. SP1 67-
7112 Amine Cap, see page 67, converts
SP1 67-6841 Nitrogen, Tetrahedral to
amino nitrogen. Blue.
Order #
SP1 67-6841
Product
Nitrogen, Tetrahedral
Product
Nitrogen, Nitrile Triple Bond
Nitrogen, Aromatic-6
For use in six-membered rings such as
SP1 67-8255 Pyridine and SP1 67-8263
Pyrimidine. Covalent radius 0.69Å within
ring and covalent radius 0.73Å to single
atoms outside ring; symbol ‘6’ stamped on
one inner face. Partial double-bond sockets notched to accept
restricted rotation connectors. SP1 67-7112 Amine Cap, see
page 67, converts SP1 67-6833 Nitrogen, Aromatic-6 to azo
nitrogen. Blue.
Order #
SP1 67-6833
Product
Nitrogen, Aromatic-6
Nitrogen, Aromatic-5
For use in five-membered rings such as in
SP1 67-8266 Imidazole or in positions 7
and 9 in SP1 67-8262 Purine. Covalent
radius 0.68Å to atoms within ring and
covalent radius 0.73Å to atoms outside
ring; bond angle 108° between atoms within ring and 126°
between single-bonded atom outside ring and double-bonded
ring atoms; symbol ‘5’ stamped on one inner face. Partial
double-bond sockets notched. SP1 67-7112 Amine Cap
converts SP1 67-6825 Nitrogen, Aromatic-5 to azo nitrogen. For
details of the SP1 67-7112 Amine Cap, see page 67. Blue.
Order #
SP1 67-6825
Product
Nitrogen, Aromatic-5
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