3,4-Bis(2-hydroxy-3-methoxybenzylideneamino)pyridine
Bi, Wei-Yu; Lü, Xing-Qiang; Cai, Wen-Li; Song, Ji-Rong; Ng, Seik Weng; Acta Crystallographica Section E 63 (2007) o1615–o1616; doi:10.1107/S1600536807009634

data_2212952
_publ_section_title
;
 3,4-Bis(2-hydroxy-3-methoxybenzylideneamino)pyridine
;
_journal_coeditor_code           LH2322
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1615
_journal_page_last               o1616
_journal_paper_doi               10.1107/S1600536807009634
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C21 H19 N3 O4'
_chemical_formula_moiety         'C21 H19 N3 O4'
_chemical_formula_sum            'C21 H19 N3 O4'
_chemical_formula_weight         377.39
_chemical_name_systematic
;
3,4-Bis(2-hydroxy-3-methoxybenzylideneamino)pyridine
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 92.142(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.0340(10)
_cell_length_b                   12.4190(10)
_cell_length_c                   21.788(2)
_cell_measurement_reflns_used    2192
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      21.8
_cell_measurement_theta_min      2.5
_cell_volume                     1902.0(4)
_computing_cell_refinement       'SAINT (Bruker, 2003)'
_computing_data_collection       'SMART (Bruker, 2003)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'X-SEED (Barbour, 2001)'
_computing_publication_material  'PublCIF (Westrip, 2007)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.97
_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  0.033
_diffrn_reflns_av_sigmaI/netI    0.046
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            10912
_diffrn_reflns_theta_full        27.5
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         1.9
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Orange
_exptl_crystal_density_diffrn    1.318
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.22
_refine_diff_density_min         -0.19
_refine_ls_extinction_coef       0.009(2)
_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   1.02
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     264
_refine_ls_number_reflns         4248
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.02
_refine_ls_R_factor_all          0.100
_refine_ls_R_factor_gt           0.048
_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^)+(0.065P)^2^+0.2087P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.122
_refine_ls_wR_factor_ref         0.147
_reflns_number_gt                2345
_reflns_number_total             4248
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            lh2322.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.

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.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1902.1(4)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2212952
_cod_database_fobs_code          2212952