Unexpected Molecular Flip in Solid-State Photodimerization
Sreevidya, Thekku Veedu; Cao, Deng-Ke; Lavy, Tali; Botoshansky, Mark; Kaftory, Menahem; Crystal Growth & Design 13 (2013) 936–; doi:10.1021/cg3016707

data_4507382
_publ_section_title
;
 Unexpected Molecular Flip in Solid-State Photodimerization
;
_journal_issue                   2
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              936
_journal_paper_doi               10.1021/cg3016707
_journal_volume                  13
_journal_year                    2013
_chemical_formula_moiety         'C30 H22 O2, 2(C7 H9 N O)'
_chemical_formula_sum            'C44 H40 N2 O4'
_chemical_formula_weight         660.78
_chemical_name_common
'Tetraphenylhexadiynediol and Dimethylpyridone'
_chemical_name_systematic
; 
 1,1,6,6-Tetraphenyl-2,4-hexadiyne-1,6-diol : 2(1,6-dimethyl-2(1H)-pyridone) 
;
_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                 114.571(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.357(2)
_cell_length_b                   8.934(2)
_cell_length_c                   20.857(4)
_cell_measurement_reflns_used    7034
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.94
_cell_measurement_theta_min      2.15
_cell_volume                     1755.1(6)
_computing_cell_refinement       'APEX2 v2010.7-0 (Bruker AXS)'
_computing_data_collection       'Bruker Instrument Service v2010.7.0.0'
_computing_data_reduction        'SAINT V7.68A (Bruker AXS, 2009)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'APEX2 DUO'
_diffrn_measurement_method       'omega scans'
_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  0.0321
_diffrn_reflns_av_sigmaI/netI    0.0551
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            7043
_diffrn_reflns_theta_full        27.41
_diffrn_reflns_theta_max         27.41
_diffrn_reflns_theta_min         2.15
_diffrn_standards_decay_%        none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.250
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Blocks
_exptl_crystal_F_000             700
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.353
_refine_diff_density_min         -0.298
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.991
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     263
_refine_ls_number_reflns         3929
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.991
_refine_ls_R_factor_all          0.1259
_refine_ls_R_factor_gt           0.0760
_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^)+(0.1625P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2208
_refine_ls_wR_factor_ref         0.2506
_reflns_number_gt                2276
_reflns_number_total             4004
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg3016707_si_002.cif
_cod_data_source_block           I-a_1.5hrs
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P21/C
_cod_database_code               4507382