Stepwise dimerization of double [2 + 2] reaction in the co-crystals of 1,5-bis(4-pyridyl)-1,4-pentadiene-3-one and phloroglucinol: a single-crystal to single-crystal transformation
Santra, Ramkinkar; Biradha, Kumar; CrystEngComm 10 (2008) 1524–; doi:10.1039/b813721h

data_7202453
_publ_section_title
;
 Stepwise dimerization of double [2 + 2] reaction in the co-crystals of
 1,5-bis(4-pyridyl)-1,4-pentadiene-3-one and phloroglucinol: a
 single-crystal to single-crystal transformation
;
_journal_issue                   11
_journal_name_full               CrystEngComm
_journal_page_first              1524
_journal_paper_doi               10.1039/b813721h
_journal_volume                  10
_journal_year                    2008
_chemical_formula_sum            'C21 H18 N2 O3'
_chemical_formula_weight         346.37
_chemical_name_systematic
;
?
;
_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           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.868(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.543(4)
_cell_length_b                   21.387(9)
_cell_length_c                   8.802(4)
_cell_measurement_reflns_used    3912
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.16
_cell_measurement_theta_min      1.90
_cell_volume                     1790.0(13)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker-APEX-2 CCD area detector'
_diffrn_measurement_method       hemisphere
_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  0.0441
_diffrn_reflns_av_sigmaI/netI    0.0306
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            23691
_diffrn_reflns_theta_full        27.16
_diffrn_reflns_theta_max         27.16
_diffrn_reflns_theta_min         1.90
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.987
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.285
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       blocks
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.128
_refine_diff_density_min         -0.155
_refine_diff_density_rms         0.032
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.968
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     243
_refine_ls_number_reflns         3912
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.968
_refine_ls_R_factor_all          0.0781
_refine_ls_R_factor_gt           0.0427
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0567P)^2^+0.2049P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1038
_refine_ls_wR_factor_ref         0.1155
_reflns_number_gt                2520
_reflns_number_total             3912
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b813721h.txt
_cod_data_source_block           2
_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.

'_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 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7202453