Structural transformations in crystals induced by radiation and pressure. Part 4. The complex influence of high pressure on the path and kinetics of the [2 + 2] photodimerization
Bąkowicz, J.; Turowska-Tyrk, I.; CrystEngComm 18 (2016) 8898–; doi:10.1039/C6CE01650B

data_7226912
_publ_section_title
;
 Structural transformations in crystals induced by radiation and pressure.
 Part 4. The complex influence of high pressure on the path and kinetics
 of the [2 + 2] photodimerization
;
_journal_issue                   46
_journal_name_full               CrystEngComm
_journal_page_first              8898
_journal_paper_doi               10.1039/C6CE01650B
_journal_volume                  18
_journal_year                    2016
_chemical_formula_sum            'C19 H18 O'
_chemical_formula_weight         262.33
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     isomor
_atom_sites_solution_secondary   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-07-26 deposited with the CCDC.
2016-10-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   31.07(4)
_cell_length_b                   10.5077(13)
_cell_length_c                   8.5590(9)
_cell_measurement_pressure       500000
_cell_measurement_reflns_used    1269
_cell_measurement_temperature    299(2)
_cell_measurement_theta_max      23.34
_cell_measurement_theta_min      6.66
_cell_volume                     2794(4)
_computing_cell_refinement       'CrysAlisPro (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro (Rigaku OD, 2015)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 2012)'
_computing_publication_material  'SHELXL-2014/7 (Sheldrick, 2015)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS-2013/1 (Sheldrick, 2008)'
_diffrn_ambient_pressure         500000
_diffrn_ambient_temperature      299(2)
_diffrn_detector_area_resol_mean 15.9718
_diffrn_measured_fraction_theta_full 0.325
_diffrn_measured_fraction_theta_max 0.325
_diffrn_measurement_device_type  'KM4 with Eos CCD'
_diffrn_measurement_method       '\f- and \w 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  0.2076
_diffrn_reflns_av_unetI/netI     0.1231
_diffrn_reflns_Laue_measured_fraction_full 0.325
_diffrn_reflns_Laue_measured_fraction_max 0.325
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            11138
_diffrn_reflns_point_group_measured_fraction_full 0.325
_diffrn_reflns_point_group_measured_fraction_max 0.325
_diffrn_reflns_theta_full        24.464
_diffrn_reflns_theta_max         24.464
_diffrn_reflns_theta_min         6.688
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.11732
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
SCALE3 ABSPACK (Rigaku Oxford Diffraction, 2015).

ABSORB-GUI - analytical corrections for the diamond-anvil cell 
[Angel R.J. & Gonzalez-Platas J. (2013). J. Appl. Cryst. 
46, 252-254].
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.247
_exptl_crystal_description       block
_exptl_crystal_F_000             1120
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.193
_refine_diff_density_min         -0.151
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.093
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     89
_refine_ls_number_reflns         751
_refine_ls_number_restraints     58
_refine_ls_restrained_S_all      1.089
_refine_ls_R_factor_all          0.2111
_refine_ls_R_factor_gt           0.1183
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1952P)^2^+2.3663P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3153
_refine_ls_wR_factor_ref         0.3792
_reflns_Friedel_coverage         0.000
_reflns_number_gt                375
_reflns_number_total             751
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ce01650b2.cif
_cod_data_source_block           8.7%P_0.5GPa
_cod_depositor_comments
'Adding full bibliography for 7226912--7226923.cif.'
_cod_database_code               7226912
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              9775