Polymorphism in hydrogen bonded frameworks; cyanuric acid–bis(4-pyridyl)ethene adducts
Barnett, Sarah A.; Blake, Alexander J.; Champness, Neil R.; CrystEngComm 5 (2003) 134–; doi:10.1039/b303338d

data_7204642
_publ_section_title
;
 Polymorphism in hydrogen bonded frameworks; cyanuric
 acid--bis(4-pyridyl)ethene adducts
;
_journal_issue                   24
_journal_name_full               CrystEngComm
_journal_page_first              134
_journal_paper_doi               10.1039/b303338d
_journal_volume                  5
_journal_year                    2003
_chemical_formula_moiety         'C3 H3 N3 O3, C12 H10 N2'
_chemical_formula_sum            'C15 H13 N5 O3'
_chemical_formula_weight         311.30
_chemical_name_common            '[(4,4-bpe)(cyanuric acid)]'
_chemical_name_systematic
; 
(trans-1,2-Bis(4-pyridyl)ethylene)(cyanuric acid)
;
_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   'difference Fourier synthesis'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 95.440(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   26.361(13)
_cell_length_b                   6.777(3)
_cell_length_c                   15.553(8)
_cell_measurement_reflns_used    1411
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.18
_cell_measurement_theta_min      2.63
_cell_volume                     2766(2)
_computing_cell_refinement       'Bruker SAINT version 6.02a (Bruker, 2000)'
_computing_data_collection       'Bruker SMART version 5.624 (Bruker, 2001)'
_computing_data_reduction        'Bruker SAINT; Bruker SHELXTL (Bruker, 1997)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'SHELXL-97; PLATON (Spek, 2002)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.971
_diffrn_measured_fraction_theta_max 0.902
_diffrn_measurement_device_type  'Bruker SMART1000 CCD area detector'
_diffrn_measurement_method       omega
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.105
_diffrn_reflns_av_sigmaI/netI    0.122
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            8680
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         28.57
_diffrn_reflns_theta_min         2.63
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.495
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1296
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.23
_refine_diff_density_min         -0.29
_refine_diff_density_rms         0.07
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.898
_refine_ls_hydrogen_treatment    'riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         3185
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.898
_refine_ls_R_factor_all          0.1436
_refine_ls_R_factor_gt           0.0662
_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^)+(0.0793P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1474
_refine_ls_wR_factor_ref         0.1760
_reflns_number_gt                1528
_reflns_number_total             3445
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b303338d.txt
_cod_data_source_block           Compound(1)-SABBEC
_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:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0793P)^2^] where P=(Fo^2^+2Fc^2^)/3' was changed
to 'calc'. New tag '_refine_ls_weighting_details' was created. The
value of the new tag was set to 'w=1/[\s^2^(Fo^2^)+(0.0793P)^2^]
where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 

The following automatic conversions were performed:

'_atom_sites_solution_primary' value 'direct methods' was changed to
'direct'.

'_atom_sites_solution_hydrogens' value 'geometrically placed' was
changed to 'geom'.

Automatic conversion script
Id: cif_fix_values 6452 2018-10-05 10:23:21Z andrius 
;
_cod_original_cell_volume        2766(4)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7204642