Design and synthesis of a novel triptycene-based ligand for modeling carboxylate-bridged diiron enzyme active sites.
Li, Yang; Cao, Rui; Lippard, Stephen J.; Organic letters 13 (2011) 5052–5055; doi:10.1021/ol201882v

data_1502421
_publ_section_title
;
 Design and synthesis of a novel triptycene-based ligand for modeling
 carboxylate-bridged diiron enzyme active sites.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              5052
_journal_page_last               5055
_journal_paper_doi               10.1021/ol201882v
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C23 H16 Cl2 O4'
_chemical_formula_weight         427.26
_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                 105.454(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.1415(12)
_cell_length_b                   18.793(2)
_cell_length_c                   9.4189(10)
_cell_measurement_reflns_used    9985
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.13
_cell_measurement_theta_min      2.17
_cell_volume                     1900.8(4)
_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 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0375
_diffrn_reflns_av_sigmaI/netI    0.0198
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            32852
_diffrn_reflns_theta_full        26.25
_diffrn_reflns_theta_max         26.25
_diffrn_reflns_theta_min         1.90
_exptl_absorpt_coefficient_mu    0.370
_exptl_absorpt_correction_T_max  26.37
_exptl_absorpt_correction_T_min  2.19
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.493
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             880
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.885
_refine_diff_density_min         -0.734
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     264
_refine_ls_number_reflns         3819
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0526
_refine_ls_R_factor_gt           0.0470
_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^)+(0.0689P)^2^+2.4300P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1317
_refine_ls_wR_factor_ref         0.1362
_reflns_number_gt                3367
_reflns_number_total             3819
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol201882v_si_003.cif
_cod_data_source_block           yang01s
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1900.9(4)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1502421