2-(4-Bromophenyl)oxazolo[3,2-<i>a</i>]pyrimidinium perchlorate
Victor B. Rybakov; Vadim L. Alifanov; Eugene V. Babaev; Acta Crystallographica Section E 62 (2006) o4578–o4580; doi:10.1107/S1600536806037299

data_2210695
_publ_section_title
;
 2-(4-Bromophenyl)oxazolo[3,2-<i>a</i>]pyrimidinium perchlorate
;
_journal_coeditor_code           LH2161
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o4578
_journal_page_last               o4580
_journal_paper_doi               10.1107/S1600536806037299
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C12 H8 Br N2 O +, Cl O4 -'
_chemical_formula_moiety         'C12 H8 Br N2 O +, Cl O4 -'
_chemical_formula_sum            'C12 H8 Br Cl N2 O5'
_chemical_formula_weight         375.56
_chemical_melting_point          553
_chemical_name_systematic
;
2-(4-bromophenyl)oxazolo[3,2-a]pyrimidinium perchlorate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 98.19(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.291(2)
_cell_length_b                   12.052(2)
_cell_length_c                   17.688(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      36
_cell_measurement_theta_min      34
_cell_volume                     1327.4(6)
_computing_cell_refinement       'CAD-4 EXPRESS (Enraf--Nonius, 1994)'
_computing_data_collection       'CAD-4 EXPRESS'
_computing_data_reduction        'XCAD4 (Harms & Wokadlo, (1995)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Enraf--Nonius CAD 4'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  Graphite
_diffrn_radiation_source         'Fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.5418
_diffrn_reflns_av_R_equivalents  0.0839
_diffrn_reflns_av_sigmaI/netI    0.0244
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2811
_diffrn_reflns_theta_full        74.90
_diffrn_reflns_theta_max         74.90
_diffrn_reflns_theta_min         4.45
_diffrn_standards_decay_%        3
_diffrn_standards_interval_time  60
_diffrn_standards_number         1
_exptl_absorpt_coefficient_mu    6.325
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.879
_exptl_crystal_density_method    'Not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.475
_refine_diff_density_min         -0.472
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.915
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         2714
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.915
_refine_ls_R_factor_all          0.0463
_refine_ls_R_factor_gt           0.0414
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0909P)^2^+0.38P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1060
_refine_ls_wR_factor_ref         0.1112
_reflns_number_gt                2375
_reflns_number_total             2714
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            lh2161.cif
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_hydrogens' value 'Geom' changed to
'geom' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_primary' value 'Direct' changed to
'direct' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_secondary' value 'Difmap' changed to
'difmap' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_matrix_type' value 'Full' changed to 'full'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_weighting_scheme' value 'Calc' changed to 'calc'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_hydrogens' value 'Geom' changed to
'geom' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_primary' value 'Direct' changed to
'direct' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_secondary' value 'Difmap' changed
to 'difmap' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_matrix_type' value 'Full' changed to 'full'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_weighting_scheme' value 'Calc' changed to
'calc' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2210695
_cod_database_fobs_code          2210695