3,6-Bis(4-methoxybenzyloxy)pyridazine
Fang-Zhong Hu; Min Zhang; Hai-Bin Song; Xiao-Mao Zou; Hua-Zheng Yang; Acta Crystallographica Section E 61 (2005) o2486–o2488; doi:10.1107/S1600536805021173

data_2206466
_publ_section_title
;
 3,6-Bis(4-methoxybenzyloxy)pyridazine
;
_journal_coeditor_code           IS6098
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2486
_journal_page_last               o2488
_journal_paper_doi               10.1107/S1600536805021173
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C20 H20 N2 O4'
_chemical_formula_moiety         'C20 H20 N2 O4'
_chemical_formula_sum            'C20 H20 N2 O4'
_chemical_formula_weight         352.38
_chemical_name_systematic
;
3,6-Bis(4-methoxybenzyloxy)pyridazine
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.305(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   33.126(9)
_cell_length_b                   5.7499(15)
_cell_length_c                   9.258(3)
_cell_measurement_reflns_used    1236
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      24.26
_cell_measurement_theta_min      3.60
_cell_volume                     1763.4(9)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'SHELXTL (Bruker, 1999)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \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  0.0391
_diffrn_reflns_av_sigmaI/netI    0.0429
_diffrn_reflns_limit_h_max       40
_diffrn_reflns_limit_h_min       -40
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            4724
_diffrn_reflns_theta_full        26.38
_diffrn_reflns_theta_max         26.38
_diffrn_reflns_theta_min         1.23
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.981
_exptl_absorpt_correction_T_min  0.958
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.327
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.142
_refine_diff_density_min         -0.128
_refine_ls_extinction_coef       0.0041(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     120
_refine_ls_number_reflns         1801
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0846
_refine_ls_R_factor_gt           0.0400
_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^)+(0.0535P)^2^+0.2049P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0948
_refine_ls_wR_factor_ref         0.1146
_reflns_number_gt                1051
_reflns_number_total             1801
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            is6098.cif
_cod_data_source_block           I
_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.

'_geom_torsion_publ_flag' value 'Yes' changed to 'yes'
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.

'_geom_torsion_publ_flag' value 'Yes' changed to 'yes'
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      'C 2/c'
_cod_database_code               2206466
_cod_database_fobs_code          2206466