Formation and conformational conversion of flattened partial cone oxygen bridged calix[2]arene[2]triazines.
Wang, Qi-Qiang; Wang, De-Xian; Zheng, Qi-Yu; Wang, Mei-Xiang; Organic letters 9 (2007) 2847–2850; doi:10.1021/ol0710008

data_1505442
_publ_section_title
;
 Formation and conformational conversion of flattened partial cone oxygen
 bridged calix[2]arene[2]triazines.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              2847
_journal_page_last               2850
_journal_paper_doi               10.1021/ol0710008
_journal_volume                  9
_journal_year                    2007
_chemical_formula_sum            'C50 H38 N6 O10'
_chemical_formula_weight         882.86
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 102.76(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.3404(19)
_cell_length_b                   27.574(6)
_cell_length_c                   17.783(4)
_cell_measurement_reflns_used    20336
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.48
_cell_volume                     4466.9(17)
_computing_cell_refinement       'Rapid Auto(Rigaku 2001)'
_computing_data_collection       'Rapid Auto(Rigaku 2001)'
_computing_data_reduction        'Rapid Auto(Rigaku 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'Rigaku raxis Rapid IP Area Detector'
_diffrn_measurement_method       '\w oscillation'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0464
_diffrn_reflns_av_sigmaI/netI    0.0674
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            20336
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         1.48
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.9980
_exptl_absorpt_correction_T_min  0.9318
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   abscor
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.313
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'thin platelet'
_exptl_crystal_F_000             1840
_exptl_crystal_size_max          0.77
_exptl_crystal_size_mid          0.39
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.398
_refine_diff_density_min         -0.329
_refine_diff_density_rms         0.119
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.007
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     298
_refine_ls_number_reflns         5050
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.007
_refine_ls_R_factor_all          0.1272
_refine_ls_R_factor_gt           0.0613
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0835P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1462
_refine_ls_wR_factor_ref         0.1741
_reflns_number_gt                2607
_reflns_number_total             5050
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0710008si20070429_041047.cif
_cod_data_source_block           a
_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        4466.9(16)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1505442