Four 7-aryl-substituted pyrido[2,3-<i>d</i>]pyrimidine-2,4(1<i>H</i>,3<i>H</i>)-diones: similar molecular structures but different crystal structures
Trilleras, Jorge; Quiroga, Jairo; Cobo, Justo; Hursthouse, Michael B.; Glidewell, Christopher; Acta Crystallographica Section C 65 (2009) o134–o139; doi:10.1107/S0108270109005514

data_2017032
_publ_section_title
;
 Four 7-aryl-substituted
 pyrido[2,3-<i>d</i>]pyrimidine-2,4(1<i>H</i>,3<i>H</i>)-diones:
 similar molecular structures but different crystal structures
;
_journal_coeditor_code           FA3182
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o134
_journal_page_last               o139
_journal_paper_doi               10.1107/S0108270109005514
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C21 H17 N3 O2'
_chemical_formula_moiety         'C21 H17 N3 O2'
_chemical_formula_sum            'C21 H17 N3 O2'
_chemical_formula_weight         343.38
_chemical_name_systematic
;
7-(biphenyl-4-yl)-1,3-dimethylpyrido[2,3-<i>d</i>]pyrimidine-
2,4(1<i>H</i>,3<i>H</i>)-dione
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 97.782(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.2314(5)
_cell_length_b                   17.5834(18)
_cell_length_c                   12.4864(15)
_cell_measurement_reflns_used    3613
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      3.07
_cell_volume                     1573.1(3)
_computing_cell_refinement       'DIRAX/LSQ (Duisenberg <i>et al.</i>,  2000)'
_computing_data_collection       'COLLECT (Hooft, 1999)'
_computing_data_reduction        'EVALCCD (Duisenberg <i>et al.</i>,  2003)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material
'SHELXL97 (Sheldrick, 2008) and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2004 (Burla <i>et al.</i>,  2005)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker--Nonius KappaCCD'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0922
_diffrn_reflns_av_sigmaI/netI    0.0530
_diffrn_reflns_limit_h_max       9
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_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            40144
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.29
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.947
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.450
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.480
_refine_diff_density_min         -0.336
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     237
_refine_ls_number_reflns         3612
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.1569
_refine_ls_R_factor_gt           0.0727
_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^)+(0.1380P)^2^+0.2972P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1797
_refine_ls_wR_factor_ref         0.2436
_reflns_number_gt                1851
_reflns_number_total             3612
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fa3182.cif
_cod_data_source_block           II
_cod_depositor_comments
;
The following automatic conversions were performed:
'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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/c'
_cod_database_code               2017032
_cod_database_fobs_code          2017032