Structure Data of Free Polyatomic Molecules
249
MW
H2NSr
r0
N–H
Sr–N
Strontium monoamide
Å a)
1.021(5)
2.256(2)
θ0
H–N–H
deg a)
105.4(5)
C2v
SrNH2
~
The SrNH2 radical has the X 2A1 ground electronic state.
The present study provides additional evidence that the
radical is planar with ionic bonding.
a
) Uncertainties were not estimated in the original paper.
Thompsen, J.M., Sheridan, P.M., Ziurys, L.M.: Chem. Phys. Lett. 330 (2000) 373.
LIF
State
Energy [eV]
r0(Sr−N) [Å]
r0(N−H) [Å]
θ0(H−N−H) [deg]
~
X 2A1
0.00
2.247
1.041a)
100.0
~
A 2B 2
1.764
2.223
1.041a)
97.7
~
B 2B 1
1.821
2.228
1.041a)
99.7
Strontium monoamide was prepared in a Broida type oven by the reaction of strontium vapor
~
~
~
~
~
~
with ammonia. The A 2B2 − X 2A1, B 2B1 − X 2A1 and C 2A1 − X 2A1 transitions were studied
in laser-excited fluorescence and rotational analyses carried out for the first two. Structural
parameters were deduced from the rotational constants.
a
) Assumed.
Brazier, C.R., Bernath, P.F.: J. Mol. Spectrosc. 201 (2000) 116.
Landolt-Börnstein
New Series II/28A