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_7102443
_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            'C34 H42 Li N O6 P2 Se2'
_chemical_formula_weight         787.49
_chemical_name_common            (Li(15C5))(Ph2SePNPSePh2)
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                97.60(2)
_cell_angle_beta                 91.13(3)
_cell_angle_gamma                103.26(3)
_cell_formula_units_Z            2
_cell_length_a                   11.449(5)
_cell_length_b                   12.050(3)
_cell_length_c                   13.894(3)
_cell_measurement_reflns_used    38
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.96
_cell_measurement_theta_min      4.85
_cell_volume                     1846.9(10)
_computing_cell_refinement       'xscans ver 2.1 (Siemens 1994)'
_computing_data_collection       'xscans ver 2.1 (Siemens 1994)'
_computing_data_reduction        'xscans ver 2.1 (Siemens 1994)'
_computing_molecular_graphics    'XP SHELXTL/PC (Sheldrick 1990)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Siemens P4/PC'
_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  0.0564
_diffrn_reflns_av_sigmaI/netI    0.0979
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            6793
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.13
_diffrn_standards_decay_%        2
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    2.131
_exptl_absorpt_correction_T_max  0.5667
_exptl_absorpt_correction_T_min  0.5093
_exptl_absorpt_correction_type   psi-scan
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.416
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             804
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.383
_refine_diff_density_min         -0.417
_refine_diff_density_rms         0.072
_refine_ls_extinction_coef       0.0055(5)
_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   0.939
_refine_ls_hydrogen_treatment    'noref except H6A and H6B on O6'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     422
_refine_ls_number_reflns         6445
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.939
_refine_ls_R_factor_all          0.0955
_refine_ls_R_factor_gt           0.0461
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0480P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0976
_refine_ls_wR_factor_ref         0.1111
_reflns_number_gt                3589
_reflns_number_total             6445
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b311524k.txt
_cod_data_source_block           compound3
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 

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^)+(0.0480P)^2^] 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^)+(0.0480P)^2^]
where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_database_code               7102443