A new ligand for metal-organic framework and co-crystal synthesis: mechanochemical route to rctt-1,2,3,4-tetrakis-(4'-carboxyphenyl)-cyclobutane.
Kole, Goutam Kumar; Koh, Lip Lin; Lee, So Young; Lee, Shim Sung; Vittal, Jagadese J.; Chemical communications (Cambridge, England) 46 (2010) 3660–3662; doi:10.1039/c0cc00012d

data_7105618
_publ_section_title
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 A new ligand for metal-organic framework and co-crystal synthesis:
 mechanochemical route to
 rctt-1,2,3,4-tetrakis-(4'-carboxyphenyl)-cyclobutane.
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_journal_issue                   21
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              3660
_journal_page_last               3662
_journal_paper_doi               10.1039/c0cc00012d
_journal_volume                  46
_journal_year                    2010
_chemical_formula_sum            'C45 H38 N2 O9'
_chemical_formula_weight         750.77
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 94.195(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.4208(6)
_cell_length_b                   10.3302(6)
_cell_length_c                   34.5404(19)
_cell_measurement_reflns_used    2813
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      21.81
_cell_measurement_theta_min      2.36
_cell_volume                     3708.3(4)
_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, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0498
_diffrn_reflns_av_sigmaI/netI    0.0535
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -41
_diffrn_reflns_number            21057
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.06
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9851
_exptl_absorpt_correction_T_min  0.9669
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'Sadabs, (Sheldrick 2001)'
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.345
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       Block
_exptl_crystal_F_000             1576
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.516
_refine_diff_density_min         -0.367
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     514
_refine_ls_number_reflns         6533
_refine_ls_number_restraints     34
_refine_ls_restrained_S_all      64.965
_refine_ls_R_factor_all          0.1030
_refine_ls_R_factor_gt           0.0741
_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^)+(0.0637P)^2^+4.4746P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1636
_refine_ls_wR_factor_ref         0.1796
_reflns_number_gt                4752
_reflns_number_total             6533
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0cc00012d.txt
_cod_data_source_block           compound_3
_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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7105618