4a,5-Dihydro-2<i>H</i>-chromeno[4,3-<i>c</i>]pyridazin-3(4<i>H</i>)-one
Zhong-Zhen Zhou; Hong-Bin Zhou; Acta Crystallographica Section E 63 (2007) o2512–o2512; doi:10.1107/S1600536807017837

data_2213353
_publ_section_title
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 4a,5-Dihydro-2<i>H</i>-chromeno[4,3-<i>c</i>]pyridazin-3(4<i>H</i>)-one
;
_journal_coeditor_code           HB2364
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2512
_journal_page_last               o2512
_journal_paper_doi               10.1107/S1600536807017837
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C11 H10 N2 O2'
_chemical_formula_moiety         'C11 H10 N2 O2'
_chemical_formula_sum            'C11 H10 N2 O2'
_chemical_formula_weight         202.21
_chemical_name_systematic
;
4a,5-Dihydro-2H-chromeno[4,3-c]pyridazin-3(4H)-one
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.6838(10)
_cell_length_b                   7.4659(9)
_cell_length_c                   33.322(4)
_cell_measurement_reflns_used    1006
_cell_measurement_temperature    292(2)
_cell_measurement_theta_max      19.83
_cell_measurement_theta_min      2.44
_cell_volume                     1911.6(4)
_computing_cell_refinement       'SAINT (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXTL (Bruker, 2001)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      292(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker SMART 4K CCD area-detector'
_diffrn_measurement_method       \w
_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  0.0573
_diffrn_reflns_av_sigmaI/netI    0.0386
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -41
_diffrn_reflns_number            9576
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.22
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.961
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.405
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.189
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_refine_ls_abs_structure_details none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
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_refine_ls_number_reflns         1906
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_refine_ls_R_factor_all          0.0977
_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
'calc w = 1/[\s^2^(Fo^2^)+(0.1059P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1462
_refine_ls_wR_factor_ref         0.1786
_reflns_number_gt                1211
_reflns_number_total             1906
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hb2364.cif
_cod_data_source_block           I
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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_database_code               2213353
_cod_database_fobs_code          2213353