Hydrogen-bond quenching of photodecarbonylation in the solid state and recovery of reactivity by co-crystallization
Zhang, Jing; Gembicky, Milan; Messerschmidt, Marc; Coppens, Philip; Chemical Communications (Cambridge, United Kingdom)  (2007) 2399–2401; doi:10.1039/b700073a

data_7101965
_publ_section_title
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 Hydrogen-bond quenching of photodecarbonylation in the solid state and
 recovery of reactivity by co-crystallization
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   23
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              2399
_journal_page_last               2401
_journal_paper_doi               10.1039/b700073a
_journal_year                    2007
_chemical_formula_moiety         'C19 H22 O3'
_chemical_formula_sum            'C19 H22 O3'
_chemical_formula_weight         298.37
_chemical_name_common
'2, 2, 4, 4-Tetramethyl -1,3 di(4-hydroxylphenyl)acetone'
_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                 98.7710(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.0719(2)
_cell_length_b                   11.2639(2)
_cell_length_c                   14.2688(3)
_cell_measurement_reflns_used    3310
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      26.134
_cell_measurement_theta_min      2.879
_cell_volume                     1599.85(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and 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  0.0214
_diffrn_reflns_av_sigmaI/netI    0.0188
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            14699
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.970
_exptl_absorpt_correction_type   'empirical SADABS'
_exptl_absorpt_process_details
'Blessing, R. (1995) Acta Crystallogr., A51, 33-38'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.239
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.355
_refine_diff_density_min         -0.209
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     211
_refine_ls_number_reflns         3682
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0419
_refine_ls_R_factor_gt           0.0354
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0466P)^2^+0.6029P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0897
_refine_ls_wR_factor_ref         0.0944
_reflns_number_gt                3214
_reflns_number_total             3682
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b700073a.txt
_cod_data_source_block           HOTMK
_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 1527 2010-12-29 10:47:43Z saulius 
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_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7101965