Synthesis of tetraazacalix[2]arene[2]triazines: tuning the cavity by the substituents on the bridging nitrogen atoms.
Wang, Qi-Qiang; Wang, De-Xian; Ma, Hong-Wei; Wang, Mei-Xiang; Organic letters 8 (2006) 5967–5970; doi:10.1021/ol062441e

data_1506308
_publ_section_title
;
 Synthesis of tetraazacalix[2]arene[2]triazines: tuning the cavity by the
 substituents on the bridging nitrogen atoms.
;
_journal_issue                   26
_journal_name_full               'Organic letters'
_journal_page_first              5967
_journal_page_last               5970
_journal_paper_doi               10.1021/ol062441e
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C51 H50 Cl2 N12 O4'
_chemical_formula_weight         965.93
_chemical_name_systematic
; 

 ? 

;
_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                 110.21(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   26.598(5)
_cell_length_b                   9.4281(19)
_cell_length_c                   20.033(4)
_cell_measurement_reflns_used    10211
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.42
_cell_measurement_theta_min      1.63
_cell_volume                     4714.4(18)
_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 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Rigaku Raxis Rapid IP'
_diffrn_measurement_method       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  0.0255
_diffrn_reflns_av_sigmaI/netI    0.0309
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            10211
_diffrn_reflns_theta_full        27.42
_diffrn_reflns_theta_max         27.42
_diffrn_reflns_theta_min         1.63
_exptl_absorpt_coefficient_mu    0.198
_exptl_absorpt_correction_T_max  0.9302
_exptl_absorpt_correction_T_min  0.8987
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   abscor
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.361
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2024
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.42
_exptl_crystal_size_min          0.37
_refine_diff_density_max         0.428
_refine_diff_density_min         -0.592
_refine_diff_density_rms         0.143
_refine_ls_extinction_coef       0.0085(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     317
_refine_ls_number_reflns         5352
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0791
_refine_ls_R_factor_gt           0.0588
_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^)+(0.0857P)^2^+4.2112P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1551
_refine_ls_wR_factor_ref         0.1714
_reflns_number_gt                4163
_reflns_number_total             5352
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol062441esi20061004_092749.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        4714.4(16)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1506308