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_4029645
_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            'C25 H18 O4'
_chemical_formula_weight         382.39
_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                74.4640(10)
_cell_angle_beta                 71.9290(10)
_cell_angle_gamma                83.3480(10)
_cell_formula_units_Z            2
_cell_length_a                   7.6930(3)
_cell_length_b                   11.2962(5)
_cell_length_c                   11.8573(5)
_cell_measurement_reflns_used    6106
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      25.59
_cell_measurement_theta_min      2.29
_cell_volume                     943.20(7)
_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 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II Quazar'
_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  0.0303
_diffrn_reflns_av_sigmaI/netI    0.0260
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            17182
_diffrn_reflns_theta_full        25.74
_diffrn_reflns_theta_max         25.74
_diffrn_reflns_theta_min         1.86
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.9928
_exptl_absorpt_correction_T_min  0.9847
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.346
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       polyhedron
_exptl_crystal_F_000             400
_exptl_crystal_size_max          0.17
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.173
_refine_diff_density_min         -0.209
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     308
_refine_ls_number_reflns         3604
_refine_ls_number_restraints     87
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0543
_refine_ls_R_factor_gt           0.0408
_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^)+(0.0349P)^2^+0.4386P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0978
_refine_ls_wR_factor_ref         0.1045
_reflns_number_gt                2822
_reflns_number_total             3604
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo5010235_si_006.cif
_cod_data_source_block           sme23
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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.
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_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4029645