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2.  Two of the N atoms are flagged in the CIF as riding, which makes no sense:
N3 N 0.25891(17) -0.09651(4) 1.18650(16) 0.0477(6) Uani 1 2 d R . .
N4 N 0.28998(17) -0.03920(4) 1.36737(16) 0.0448(6) Uani 1 2 d R . .
Please note the alerts in the attached checking report which indicate this problem, but which appear to have been ignored.

3. The very rapid increase in the R factors as theta increases beyond 20 degrees suggests that there may be systematic problems with the diffraction data:
===========================================================
Theta sin(Th)/Lambda  #    R1    wR2      S  av(I/SigW)  av(I)    av(SigW)
-------------------------------------------------------------------------------
12.38    0.302    398  0.037  0.119  1.376  10.79    1238.93      93.78
15.68    0.380    389  0.046  0.123  1.073    7.39      182.42      17.42
18.02    0.435    389  0.048  0.130  0.968    6.02      171.10      18.90
19.90    0.479    402  0.056  0.157  1.009    5.10      133.98      17.58
21.51    0.516    397  0.073  0.199  0.951    3.43      72.51      14.73
22.94    0.548    399  0.093  0.270  0.964    2.58      47.33      13.62
24.22    0.577    396  0.106  0.321  0.864    1.79      31.57      13.67
25.40    0.603    395  0.134  0.436  0.860    1.30      21.16      13.85
26.49    0.628    390  0.167  0.495  0.863    1.08      19.22      14.59
27.52    0.650    383  0.178  0.533  0.841    0.99      18.67      16.43
28.00    0.660    156  0.262  0.667  0.831    0.82      14.82      17.68

=======================================================
The outer data are little better than noise, pointing to the need for low-temperature data collection.
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