Insight into the strong aggregation-induced emission of low-conjugated racemic C6-unsubstituted tetrahydropyrimidines through crystal-structure–property relationship of polymorphs
Zhu, Qiuhua; Zhang, Yilin; Nie, Han; Zhao, Zujin; Liu, Shuwen; Wong, Kam Sing; Tang, Ben Zhong; Chem. Sci. 6 (2015) 4690–; doi:10.1039/C5SC01226K

data_1520041
_publ_section_title
;
 Insight into the strong aggregation-induced emission of low-conjugated
 racemic C6-unsubstituted tetrahydropyrimidines through
 crystal-structure--property relationship of polymorphs
;
_journal_issue                   8
_journal_name_full               'Chem. Sci.'
_journal_page_first              4690
_journal_paper_doi               10.1039/C5SC01226K
_journal_volume                  6
_journal_year                    2015
_chemical_formula_sum            'C26 H22 Br2 N2 O4'
_chemical_formula_weight         586.28
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2014-06-29 deposited with the CCDC.
2015-05-26 downloaded from the CCDC.
;
_cell_angle_alpha                87.14(3)
_cell_angle_beta                 76.74(3)
_cell_angle_gamma                74.96(3)
_cell_formula_units_Z            4
_cell_length_a                   12.571(3)
_cell_length_b                   13.241(3)
_cell_length_c                   15.845(3)
_cell_measurement_temperature    298(2)
_cell_volume                     2479.1(11)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.961
_diffrn_measured_fraction_theta_max 0.961
_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  0.0628
_diffrn_reflns_av_sigmaI/netI    0.1777
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            11988
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.59
_exptl_absorpt_coefficient_mu    3.305
_exptl_absorpt_correction_T_max  0.5043
_exptl_absorpt_correction_T_min  0.4372
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Higashi, T. (1995)'
_exptl_crystal_density_diffrn    1.571
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1176
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.558
_refine_diff_density_min         -0.639
_refine_diff_density_rms         0.111
_refine_ls_extinction_coef       0.0217(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     596
_refine_ls_number_reflns         8381
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.1918
_refine_ls_R_factor_gt           0.1112
_refine_ls_shift/su_max          0.014
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+54.5871P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2164
_refine_ls_wR_factor_ref         0.2485
_reflns_number_gt                4046
_reflns_number_total             8381
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5sc01226k2.cif
_cod_data_source_block           t
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3271 2015-04-21 07:52:19Z andrius 

 Adding full bibliography for 1520038--1520042.cif.
;
_cod_original_cell_volume        2479.0(9)
_cod_original_sg_symbol_H-M      'P-1   '
_cod_database_code               1520041