Kinetics of solid state photodimerization of 1,4-dimethyl-2-pyridinone in its molecular compound.
Cao, Deng-Ke; Sreevidya, Thekku Veedu; Botoshansky, Mark; Golden, Gilad; Benedict, Jason Brown; Kaftory, Menahem; The journal of physical chemistry. A 114 (2010) 7377–7381; doi:10.1021/jp101703q

data_1502682
_publ_section_title
;
 Kinetics of solid state photodimerization of 1,4-dimethyl-2-pyridinone in
 its molecular compound.
;
_journal_issue                   27
_journal_name_full               'The journal of physical chemistry. A'
_journal_page_first              7377
_journal_page_last               7381
_journal_paper_doi               10.1021/jp101703q
_journal_volume                  114
_journal_year                    2010
_chemical_formula_moiety         'C30 H22 O2 : C14 H18 N2 O2)'
_chemical_formula_sum            'C44 H40 N2 O4'
_chemical_formula_weight         660.78
_chemical_name_systematic
; 
 1,1,6,6-tetraphenyl-2,4-hexadiyne-1,6-diol : dimer of 1,4-dimethyl-2-pyridinone  
;
_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
_cell_angle_alpha                65.404(2)
_cell_angle_beta                 86.157(2)
_cell_angle_gamma                66.822(2)
_cell_formula_units_Z            1
_cell_length_a                   8.4113(6)
_cell_length_b                   10.8816(9)
_cell_length_c                   11.4046(8)
_cell_measurement_reflns_used    2312
_cell_measurement_temperature    280(2)
_cell_measurement_theta_max      30.84
_cell_measurement_theta_min      2.25
_cell_volume                     866.65(11)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      280(2)
_diffrn_measured_fraction_theta_full 0.907
_diffrn_measured_fraction_theta_max 0.907
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0407
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            8212
_diffrn_reflns_theta_full        31.17
_diffrn_reflns_theta_max         31.17
_diffrn_reflns_theta_min         1.98
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.266
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             350
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.346
_refine_diff_density_min         -0.190
_refine_diff_density_rms         0.044
_refine_ls_extinction_coef       0.006(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   1.020
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     242
_refine_ls_number_reflns         5090
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0754
_refine_ls_R_factor_gt           0.0499
_refine_ls_shift/su_max          0.144
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0755P)^2^+0.1186P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1339
_refine_ls_wR_factor_ref         0.1526
_reflns_number_gt                3502
_reflns_number_total             5090
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp101703q_si_006.cif
_cod_data_source_block           c:\Cao18(280K)(100)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1502682