Structural transformations in zopiclone.
Shankland, N.; David, W. I.; Shankland, K.; Kennedy, A. R.; Frampton, C. S.; Florence, A. J.; Chemical communications (Cambridge, England)  (2001) 2204–2205; doi:10.1039/b107075d

data_7125498
_publ_section_title
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 Structural transformations in zopiclone.
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_journal_issue                   21
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              2204
_journal_page_last               2205
_journal_paper_doi               10.1039/b107075d
_journal_year                    2001
_chemical_formula_sum            'C17 H17 Cl N6 O3'
_chemical_formula_weight         388.82
_chemical_melting_point          177?
_chemical_name_common            zopiclone
_chemical_name_systematic
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(6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-oxo-5H-pyrrolo(3,4-b)pyrazin-5-yl)
-4-methyl-1-piperazine carboxylate  
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_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.50230(10)
_cell_length_b                   8.7676(2)
_cell_length_c                   35.5314(7)
_cell_measurement_reflns_used    6228
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      26.37
_cell_measurement_theta_min      2.91
_cell_volume                     1714.10(6)
_computing_cell_refinement       'Denzo & Collect'
_computing_data_collection
;
Denzo & Collect (Otwinowski & Minor, 1997; Hooft & Nonius 1988)
;
_computing_data_reduction        'Denzo & Collect'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'phi and omega scans to fill Ewald sphere'
_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  0.0465
_diffrn_reflns_av_sigmaI/netI    0.0575
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       44
_diffrn_reflns_limit_l_min       -43
_diffrn_reflns_number            8033
_diffrn_reflns_theta_full        26.38
_diffrn_reflns_theta_max         26.38
_diffrn_reflns_theta_min         3.26
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.257
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.913
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SORTAV Blessing, 1997'
_exptl_crystal_colour            clear
_exptl_crystal_density_diffrn    1.507
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       box
_exptl_crystal_F_000             808
_exptl_crystal_preparation       'ethylacetate solution'
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.273
_refine_diff_density_min         -0.293
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.060
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         3302
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.060
_refine_ls_R_factor_all          0.0493
_refine_ls_R_factor_gt           0.0380
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0337P)^2^+0.0876P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0794
_refine_ls_wR_factor_ref         0.0844
_reflns_number_gt                2835
_reflns_number_total             3302
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b107075d.txt
_cod_data_source_block           box_zopiclone
_cod_depositor_comments
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The following automatic conversions were performed:

data item '_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0337P)^2^+0.0876P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. A new data item '_refine_ls_weighting_details' was
created with the value set to
'w=1/[\s^2^(Fo^2^)+(0.0337P)^2^+0.0876P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
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_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7125498