Tetrakis(4-pyridyl)methane: synthesis, properties, and a diamondoid network structure of its silver(I) complex.
Matsumoto, Kouzou; Kannami, Masaki; Inokuchi, Daisuke; Kurata, Hiroyuki; Kawase, Takeshi; Oda, Masaji; Organic letters 9 (2007) 2903–2906; doi:10.1021/ol071189n

data_1505468
_publ_section_title
;
 Tetrakis(4-pyridyl)methane: synthesis, properties, and a diamondoid
 network structure of its silver(I) complex.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              2903
_journal_page_last               2906
_journal_paper_doi               10.1021/ol071189n
_journal_volume                  9
_journal_year                    2007
_chemical_formula_moiety         'C21 H16 B Ag F4 N4 '
_chemical_formula_sum            'C21 H16 Ag B F4 N4'
_chemical_formula_weight         519.06
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      18
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.871(6)
_cell_length_b                   13.979(5)
_cell_length_c                   17.520(6)
_cell_measurement_reflns_used    13033
_cell_measurement_temperature    200.2
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.1
_cell_volume                     3397(2)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        'teXsan Ver. 2.0'
_computing_publication_material  'teXsan Ver. 2.0'
_computing_structure_refinement  SHELXL97
_computing_structure_solution    'DIRDIF94 (PATTY)'
_diffrn_detector_area_resol_mean 10.00
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID Imaging Plate'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.095
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            31541
_diffrn_reflns_theta_max         27.47
_exptl_absorpt_coefficient_mu    0.623
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.015
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1032.00
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.200
_refine_diff_density_max         1.39
_refine_diff_density_min         -2.51
_refine_ls_abs_structure_Flack   0.9(1)
_refine_ls_extinction_coef       0.0000
_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   1.080
_refine_ls_hydrogen_treatment    noref
_refine_ls_number_parameters     248
_refine_ls_number_reflns         7735
_refine_ls_R_factor_gt           0.1319
_refine_ls_shift/su_max          -0.0060
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^) + (0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
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_reflns_number_gt                2876
_reflns_number_total             7735
_reflns_threshold_expression     >2.0sigma(I)
_cod_data_source_file            ol071189n-file001.cif
_cod_data_source_block           matsumoto0920
_cod_original_cell_volume        3397(8)
_cod_original_sg_symbol_H-M      'P 21 21 2    '
_cod_original_formula_sum        'C21 H16 B Ag F4 N4 '
_cod_database_code               1505468