A powerful novel strategy for the preparation of discrete inorganic carbon-free rings containing alkaline cations.
Hernández-Arganis, Michelle; Hernández-Ortega, Simón; Toscano, Rubén A; García-Montalvo, Verónica; Cea-Olivares, Raymundo; Chemical communications (Cambridge, England)  (2004) 310–311; doi:10.1039/b311524k

data_7102437
_publ_section_title
;
 A powerful novel strategy for the preparation of discrete inorganic
 carbon-free rings containing alkaline cations.
;
_journal_issue                   3
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              310
_journal_page_last               311
_journal_paper_doi               10.1039/b311524k
_journal_year                    2004
_chemical_formula_sum            'C36 H44 Cs N O6 P2 Se2'
_chemical_formula_weight         939.49
_chemical_name_common
'(Cs(18-crown-6)) tetraphenyldiselenodimidodiphosphinate'
_chemical_name_systematic
;
[Cs(18-crown-6)] tetraphenyldiselenodimidodiphosphinate
;
_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   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.80(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.232(2)
_cell_length_b                   20.359(3)
_cell_length_c                   21.385(3)
_cell_measurement_reflns_used    42
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12.50
_cell_measurement_theta_min      5.00
_cell_volume                     4005.3(12)
_computing_cell_refinement       'XSCANS ver 2.1 1993'
_computing_data_collection       'XSCANS ver 2.1 1993'
_computing_data_reduction        'XSCANS ver 2.1 1993'
_computing_molecular_graphics    'SHELXTL V 6.10'
_computing_publication_material  'SHELXTL V 6.10'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'Siemens P4/PC diffracometer'
_diffrn_measurement_method       \w:2\q
_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  0.0499
_diffrn_reflns_av_sigmaI/netI    0.1161
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            7512
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.50
_diffrn_standards_decay_%        3
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    2.864
_exptl_absorpt_correction_T_max  0.371
_exptl_absorpt_correction_T_min  0.233
_exptl_absorpt_correction_type   psi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.558
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1872
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.44
_exptl_crystal_size_min          0.32
_refine_diff_density_max         0.939
_refine_diff_density_min         -1.105
_refine_diff_density_rms         0.094
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     489
_refine_ls_number_reflns         7044
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.1952
_refine_ls_R_factor_gt           0.0808
_refine_ls_shift/su_max          1.260
_refine_ls_shift/su_mean         0.062
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0498P)^2^+21.8789P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1548
_refine_ls_wR_factor_ref         0.2045
_reflns_number_gt                3011
_reflns_number_total             7044
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b311524k.txt
_cod_data_source_block           compound9
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' tag value 'psi-scans' was replaced
with 'psi-scan' value.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0498P)^2^+21.8789P] where P=(Fo^2^+2Fc^2^)/3'
was changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0498P)^2^+21.8789P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7102437