Joining the rings: the preparation of 2- and 3-indenyl-triptycenes, and curious related processes.
Nikitin, Kirill; Müller-Bunz, Helge; Ortin, Yannick; McGlinchey, Michael J.; Organic & biomolecular chemistry 5 (2007) 1952–1960; doi:10.1039/b703437g

data_7151115
_publ_section_title
;
 Joining the rings: the preparation of 2- and 3-indenyl-triptycenes,
 and curious related processes.
;
_journal_issue                   12
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              1952
_journal_page_last               1960
_journal_paper_doi               10.1039/b703437g
_journal_volume                  5
_journal_year                    2007
_chemical_formula_sum            'C29 H20'
_chemical_formula_weight         368.45
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.741(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.2911(8)
_cell_length_b                   8.3652(6)
_cell_length_c                   20.6135(15)
_cell_measurement_reflns_used    8254
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      31.83
_cell_measurement_theta_min      2.46
_cell_volume                     1912.9(2)
_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      100(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_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  0.0233
_diffrn_reflns_av_sigmaI/netI    0.0221
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            20201
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    0.072
_exptl_absorpt_correction_T_max  0.9716
_exptl_absorpt_correction_T_min  0.8531
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.279
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.557
_refine_diff_density_min         -0.192
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     342
_refine_ls_number_reflns         5519
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0584
_refine_ls_R_factor_gt           0.0524
_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^)+(0.0894P)^2^+0.4559P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1317
_refine_ls_wR_factor_ref         0.1379
_reflns_number_gt                4817
_reflns_number_total             5519
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b703437g.txt
_cod_data_source_block           mjm132
_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 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7151115