Solid state double [2 + 2] photochemical reactions in the co-crystal forms of 1,5-bis(4-pyridyl)-1,4-pentadiene-3-one: establishing mechanism using single crystal X-ray, UV and 1H NMR
Santra, Ramkinkar; Biradha, Kumar; CrystEngComm 13 (2011) 3246–; doi:10.1039/c0ce00612b

data_7205673
_publ_section_title
;
 Solid state double [2 + 2] photochemical reactions in the co-crystal
 forms of 1,5-bis(4-pyridyl)-1,4-pentadiene-3-one: establishing
 mechanism using single crystal X-ray, UV and 1H NMR
;
_journal_issue                   9
_journal_name_full               CrystEngComm
_journal_page_first              3246
_journal_paper_doi               10.1039/c0ce00612b
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C78 H74 N8 O17'
_chemical_formula_weight         1395.45
_chemical_name_common
;4(1,5-bis(4-pyridyl)-1,4-pentadiene-3-
one).3(phloroglucinol).4(H2O)
;
_chemical_name_systematic
;
4(1,5-bis(4-pyridyl)-1,4-pentadiene-3-one).3(phloroglucinol).4(H2O)
;
_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                 122.935(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.3013(16)
_cell_length_b                   15.3054(13)
_cell_length_c                   28.1176(19)
_cell_measurement_reflns_used    15027
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.00
_cell_measurement_theta_min      1.26
_cell_volume                     6971.4(10)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker CCD APEX-2'
_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  0.0866
_diffrn_reflns_av_sigmaI/netI    0.0690
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            91277
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         1.26
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.984
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.330
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2936
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.549
_refine_diff_density_min         -0.334
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     908
_refine_ls_number_reflns         15072
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.1256
_refine_ls_R_factor_gt           0.0592
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1616
_refine_ls_wR_factor_ref         0.1901
_reflns_number_gt                8246
_reflns_number_total             15072
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0ce00612b.txt
_cod_data_source_block           4
_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 1555 2011-01-17 13:19:09Z saulius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7205673