The Ni-N bond lengths are 1.9306(18) to 1.9315(18) Å and the bite angle of five and six-membered chelate rings are
87.04(8) and 92.96(8)
o
, respectively. These values are similar to those in the related macrocyclic Ni(II) complex. The
average C-N bond length involving bridgehead tertiary nitrogen atom N(3) is 1.427(3) Å, which is shorter than the
normal C-N single bond length [1.469(14) Å]. Large C-N-C angle involving N(3) are found to in the range 110.83(18)
- 111.15(19)
o
. Similar shortening of the bond length and flattering of the bond angles involving uncoordinated tertiary
amine have been observed for other complexes (Ahmad Husain et al., 2011).
Table 2.
Crystal data and structure refinement for Ni(II) complex.
Identification code
Ni(II) complex
Empirical formula
C
16
H
38
Cl
2
N
6
NiO
8
Formula weight
572.13
Temperature
293(2) K
Wavelength (Å)
0.71073
Crystal system
Triclinic
Space group
P
1
a
8.2987(5) Å
b
8.4300(5) Å
c
10.1648(6) Å
D
92.2540(10)
o
E
94.8790(10)
o
J
117.3230(10)
o
Volume (Å
3
)
627.01(6)
Z
1
U
calc (g/cm
-1
)
1.515
Crystal size (mm)
0.27 x 0.126 x 0.107
Final
R
indices [
I
>2
V
(
I
)]
R
1 = 0.0315,
wR
2 = 0.0898
R
indices (all data)
R
1 = 0.0328,
wR
2 = 0.0911
221
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