*Acta Cryst.* (2001). E**57**, m359-m360 [ doi:10.1107/S1600536801011710 ]

*trans*-Bis(dicyanamido-*N*)-*trans*-bis(imidazole-*N*')copper(II)

### Key indicators

- Single-crystal X-ray study
*T* = 293 K
- Mean (C-C) = 0.008 Å
*R* factor = 0.053
*wR* factor = 0.133
- Data-to-parameter ratio = 12.1

### checkCIF results

No syntax errors found
ADDSYM reports no extra symmetry

** Alert Level A:**

CHEMW_01 Alert A The ratio of given/expected molecular weight as calculated
from the _chemical_formula_sum lies outside
the range 0.90 <> 1.10
Calculated formula weight = 331.7862
Formula weight given = 165.9000
DENSD_01 Alert A The ratio of the submitted crystal density and that
calculated from the formula is outside the range 0.90 <> 1.10
Crystal density given = 1.657
Calculated crystal density = 0.829

** Alert Level C:**

CHEMW_01 Alert C The difference between the given and expected weight for
compound is greater 1 mass unit. Check that all hydrogen
atoms have been taken into account.
PLAT_420 Alert C D-H Without Acceptor N(5) - H(5A) ?
**General Notes**

ABSTM_02 When printed, the submitted absorption T values will be replaced
by the scaled T values. Since the ratio of scaled T's is
identical to the ratio of reported T values, the scaling does
not imply a change to the absorption corrections used in the
study.
Ratio of Tmax expected/reported 1.353
Tmax scaled 0.743 Tmin scaled 0.679
CHEMW_03
From the CIF: _cell_formula_units_Z 2
From the CIF: _chemical_formula_weight 165.90
TEST: Calculate formula weight from _atom_site_*
atom mass num sum
C 12.01 10.00 120.11
H 1.01 8.00 8.06
N 14.01 10.00 140.07
Cu 63.55 1.00 63.55
Calculated formula weight 331.79
ALERT: The ratio of given/expected molecular weight as calculated
from the _atom_site* data lies outside
the range 0.90 <> 1.10

** 2 Alert Level A** = Potentially serious problem

** 0 Alert Level B** = Potential problem

** 2 Alert Level C** = Please check

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