Curved fractal structures of pyridine-substituted β-diketone crystals
Qian, Zongzheng; Li, Dongxue; Xie, Tongqing; Zhang, Xuepeng; He, Yang; Ai, Yuejie; Zhang, Guoqing; CrystEngComm 19 (2017) 2283–; doi:10.1039/C7CE00462A

data_7227919
_publ_section_title
;
 Curved fractal structures of pyridine-substituted \b-diketone crystals
;
_journal_issue                   17
_journal_name_full               CrystEngComm
_journal_page_first              2283
_journal_paper_doi               10.1039/C7CE00462A
_journal_volume                  19
_journal_year                    2017
_chemical_formula_sum            'C15 H13 N O3'
_chemical_formula_weight         255.26
_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
_audit_creation_method           SHELXL-97
_audit_update_record
;
2017-02-02 deposited with the CCDC.
2017-03-20 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 106.946(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   21.986(2)
_cell_length_b                   3.9115(4)
_cell_length_c                   30.020(2)
_cell_measurement_reflns_used    1330
_cell_measurement_temperature    290(2)
_cell_measurement_theta_max      69.3854
_cell_measurement_theta_min      3.0752
_cell_volume                     2469.6(4)
_computing_cell_refinement       'CrysAlisPro (Agilent Technologies)'
_computing_data_collection       'CrysAlisPro (Agilent Technologies)'
_computing_data_reduction        'CrysAlisPro (Agilent Technologies)'
_computing_molecular_graphics    'Ortep-3 (L. J. Farrugia, 2001)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      290(2)
_diffrn_detector_area_resol_mean 15.9149
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Gemini S Ultra, Agilent Technologies'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0259
_diffrn_reflns_av_sigmaI/netI    0.0364
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            3956
_diffrn_reflns_theta_full        65.07
_diffrn_reflns_theta_max         65.07
_diffrn_reflns_theta_min         3.08
_exptl_absorpt_coefficient_mu    0.791
_exptl_absorpt_correction_T_max  0.8578
_exptl_absorpt_correction_T_min  0.7973
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            off-white
_exptl_crystal_density_diffrn    1.373
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1072
_exptl_crystal_preparation       ', Luminescent'
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.192
_refine_diff_density_min         -0.193
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         2096
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0738
_refine_ls_R_factor_gt           0.0575
_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^)+(0.0878P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1491
_refine_ls_wR_factor_ref         0.1688
_reflns_number_gt                1522
_reflns_number_total             2096
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ce00462a2.cif
_cod_data_source_block           shelxl
_cod_depositor_comments
'Adding full bibliography for 7227918--7227920.cif.'
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7227919