Polymorphism and pseudopolymorphism in calixarenes: acetonitrile clathrates of p-But-calix[n]arenes (n = 6 and 8)
Dale, Sophie H.; Elsegood, Mark R. J.; Redshaw, Carl; CrystEngComm 5 (2003) 368–; doi:10.1039/b308407h

data_7216289
_publ_section_title
;
 Polymorphism and pseudopolymorphism in calixarenes: acetonitrile
 clathrates of p-But-calix[n]arenes (n = 6 and 8)
;
_journal_issue                   65
_journal_name_full               CrystEngComm
_journal_page_first              368
_journal_paper_doi               10.1039/b308407h
_journal_volume                  5
_journal_year                    2003
_chemical_formula_sum            'C92 H118 N2 O8'
_chemical_formula_weight         1379.88
_chemical_name_systematic
;
?
;
_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   'All non-H atoms found by direct methods'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 112.455(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   20.1552(9)
_cell_length_b                   22.9575(10)
_cell_length_c                   19.7543(9)
_cell_measurement_reflns_used    17612
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.04
_cell_measurement_theta_min      2.15
_cell_volume                     8447.5(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0496
_diffrn_reflns_av_sigmaI/netI    0.0422
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            73214
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.41
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.068
_exptl_absorpt_correction_T_max  0.985
_exptl_absorpt_correction_T_min  0.964
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v2.08 (Sheldrick, 2003)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.085
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             2992
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.44
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.552
_refine_diff_density_min         -0.335
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.134
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1047
_refine_ls_number_reflns         14882
_refine_ls_number_restraints     342
_refine_ls_restrained_S_all      1.175
_refine_ls_R_factor_all          0.0831
_refine_ls_R_factor_gt           0.0568
_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^)+(0.0995P)^2^+0.6345P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1629
_refine_ls_wR_factor_ref         0.1783
_reflns_number_gt                10177
_reflns_number_total             14882
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b308407h.txt
_cod_data_source_block           4
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7216289