Carboxylic acid-derived oxacalix[2]arene[2]pyrazine self-assembles into unprecedented diamondoid networks
Li, Xiao-Yan; Yu, Ke-Ying; Zhao, Xiao-Li; Ma, Ming-Liang; Guo, Fang; Mi, Xian-Qiang; Jiang, Biao; Wen, Ke; CrystEngComm 14 (2012) 7869–; doi:10.1039/c2ce25315a

data_7208645
_publ_section_title
;
 Carboxylic acid-derived oxacalix[2]arene[2]pyrazine self-assembles into
 unprecedented diamondoid networks
;
_journal_issue                   23
_journal_name_full               CrystEngComm
_journal_page_first              7869
_journal_paper_doi               10.1039/c2ce25315a
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C22 H12 N4 O8, (H2 O)'
_chemical_formula_sum            'C22 H14 N4 O9'
_chemical_formula_weight         478.37
_chemical_name_systematic
;
?
;
_space_group_IT_number           34
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 -2n'
_symmetry_space_group_name_H-M   'P n n 2'
_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                90.00
_cell_formula_units_Z            2
_cell_length_a                   17.7028(17)
_cell_length_b                   13.9075(14)
_cell_length_c                   5.0090(5)
_cell_measurement_reflns_used    7007
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     1233.2(2)
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_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  0.0412
_diffrn_reflns_av_sigmaI/netI    0.0252
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            13525
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         3.73
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_T_max  0.9818
_exptl_absorpt_correction_T_min  0.9621
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SAINT (SADABS)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.288
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             492
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.18
_platon_squeeze_details
;
;
_refine_diff_density_max         0.313
_refine_diff_density_min         -0.549
_refine_diff_density_rms         0.057
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.6(16)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.109
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     159
_refine_ls_number_reflns         2121
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.109
_refine_ls_R_factor_all          0.0484
_refine_ls_R_factor_gt           0.0469
_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^)+(0.1081P)^2^+0.1972P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1459
_refine_ls_wR_factor_ref         0.1477
_reflns_number_gt                2037
_reflns_number_total             2121
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce25315a.txt
_cod_data_source_block           z3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      Pnn2
_cod_database_code               7208645