Monomer, dimers and trimers of cyanogen N-oxide, NC–CN→ O. An X-ray, FVT-MS/IR and theoretical investigation
Barbieux-Flammang, Monique; Vandevoorde, Séverine; Flammang, Robert; Wong, Ming Wah; Bibas, Hervé; Kennard, Colin H. L.; Wentrup, Curt; Journal of the Chemical Society, Perkin Transactions 2  (2000) 473–; doi:10.1039/a908653f

data_7203943
_publ_section_title
;
 Monomer, dimers and trimers of cyanogen N-oxide,
 N&#xE007;C--C&#xE007;N\\rightarrow O. An X-ray, FVT-MS/IR and
 theoretical investigation
;
_journal_issue                   3
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              473
_journal_paper_doi               10.1039/a908653f
_journal_year                    2000
_chemical_formula_sum            'C6 N6 O3'
_chemical_formula_weight         204.12
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 108.35(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.093(3)
_cell_length_b                   7.5041(8)
_cell_length_c                   9.297(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      10
_cell_volume                     403.5(3)
_computing_cell_refinement       CAD4
_computing_data_collection       CAD4
_computing_data_reduction        XTAL3.2
_computing_molecular_graphics    PLATON
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.805
_diffrn_measured_fraction_theta_max 0.805
_diffrn_measurement_device_type  'Enraf Nonius CAD4'
_diffrn_measurement_method       'omega-2theta scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0093
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2017
_diffrn_reflns_theta_full        29.97
_diffrn_reflns_theta_max         29.97
_diffrn_reflns_theta_min         2.31
_diffrn_standards_interval_count 250
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.141
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.680
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             204
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.5
_refine_diff_density_max         0.218
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.057
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -2.2(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     136
_refine_ls_number_reflns         2017
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0616
_refine_ls_R_factor_gt           0.0569
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1232P)^2^+0.0025P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1483
_refine_ls_wR_factor_ref         0.1547
_reflns_number_gt                1749
_reflns_number_total             2017
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            a908653f.txt
_cod_data_source_block           1385
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.1232P)^2^+0.0025P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.1232P)^2^+0.0025P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7203943