Halogen Trimer-Mediated Hexagonal Host Framework of 2,4,6-Tris(4-halophenoxy)-1,3,5-triazine. Supramolecular Isomerism from Hexagonal Channel (X = Cl, Br) to Cage Structure (X = I)
Saha, Binoy K.; Jetti, Ram K. R.; Reddy, L. Sreenivas; Aitipamula, Srinivasulu; Nangia, Ashwini; Crystal Growth & Design 5 (2005) 887–; doi:10.1021/cg049691r

data_4504955
_publ_section_title
;
 Halogen Trimer-Mediated Hexagonal Host Framework of
 2,4,6-Tris(4-halophenoxy)-1,3,5-triazine. Supramolecular Isomerism from
 Hexagonal Channel (X = Cl, Br) to Cage Structure (X = I)
;
_journal_issue                   3
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              887
_journal_paper_doi               10.1021/cg049691r
_journal_volume                  5
_journal_year                    2005
_chemical_formula_moiety         '2(C21H12N3O3I3), CH2Cl2'
_chemical_formula_sum            'C43 H26 Cl2 I6 N6 O6'
_chemical_formula_weight         1554.57
_chemical_melting_point          251
_chemical_name_common
' 2,4,6-tris(4-iodophenoxy)-1,3,5-triazine, dichloromethane '
_chemical_name_systematic
; 
2,4,6-tris(4-iodophenoxy)-1,3,5-triazine, dichloromethane 
;
_space_group_IT_number           148
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            3
_cell_length_a                   15.7177(5)
_cell_length_b                   15.7177(5)
_cell_length_c                   18.9157(9)
_cell_measurement_temperature    293(2)
_cell_volume                     4047.0(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART CCD 1K'
_diffrn_measurement_method       'omega scan'
_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  0.0739
_diffrn_reflns_av_sigmaI/netI    0.0359
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            9521
_diffrn_reflns_theta_full        27.98
_diffrn_reflns_theta_max         27.98
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    3.600
_exptl_absorpt_correction_T_max  0.12
_exptl_absorpt_correction_T_min  0.10
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.914
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2178
_exptl_crystal_size_max          0.63
_exptl_crystal_size_mid          0.62
_exptl_crystal_size_min          0.60
_refine_diff_density_max         1.571
_refine_diff_density_min         -0.866
_refine_diff_density_rms         0.166
_refine_ls_extinction_coef       0.00047(15)
_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   1.109
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     110
_refine_ls_number_reflns         2179
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.110
_refine_ls_R_factor_all          0.0612
_refine_ls_R_factor_gt           0.0527
_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^)+(0.1055P)^2^+16.7099P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1728
_refine_ls_wR_factor_ref         0.1803
_reflns_number_gt                1768
_reflns_number_total             2179
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg049691rsi20040907_112405.cif
_cod_data_source_block           b4dum
_cod_original_sg_symbol_H-M      R-3
_cod_database_code               4504955