Bridged tolanes: a twisted tale.
Menning, Sebastian; Krämer, Maximilian; Duckworth, Andrew; Rominger, Frank; Beeby, Andrew; Dreuw, Andreas; Bunz, Uwe H. F.; The Journal of organic chemistry 79 (2014) 6571–6578; doi:10.1021/jo5010235

data_4029639
_publ_section_title
;
 Bridged tolanes: a twisted tale.
;
_journal_issue                   14
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              6571
_journal_page_last               6578
_journal_paper_doi               10.1021/jo5010235
_journal_volume                  79
_journal_year                    2014
_chemical_formula_sum            'C24 H22 O4'
_chemical_formula_weight         374.42
_chemical_name_systematic
; 
 ? 
;
_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                 102.876(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.8725(16)
_cell_length_b                   13.2200(17)
_cell_length_c                   12.4188(16)
_cell_measurement_reflns_used    6507
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      24.98
_cell_measurement_theta_min      2.28
_cell_volume                     1900.2(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'ImuS microsource'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0310
_diffrn_reflns_av_sigmaI/netI    0.0260
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            19160
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         1.76
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.9982
_exptl_absorpt_correction_T_min  0.9740
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.309
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.194
_refine_diff_density_min         -0.215
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     320
_refine_ls_number_reflns         3361
_refine_ls_number_restraints     94
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0591
_refine_ls_R_factor_gt           0.0428
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0442P)^2^+0.9190P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1021
_refine_ls_wR_factor_ref         0.1101
_reflns_number_gt                2624
_reflns_number_total             3361
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo5010235_si_005.cif
_cod_data_source_block           sme19
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 4029638--4029646.cif.
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4029639