The design and synthesis of non-centric diamond-like networks based NH4+ ion
; Chemical communications (Cambridge, England)  (2003) –; doi:10.1039/b306253h

data_7103885
_publ_section_title
;
The design and synthesis of non-centric
diamond-like networks based NH4+ ion
;
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_paper_doi               10.1039/b306253h
_journal_year                    2003
_chemical_formula_sum            'C20 H21 F6 N5 O4.5 P'
_chemical_formula_weight         548.39
_chemical_name_systematic
;
?
;
_space_group_IT_number           118
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P -4 -2n'
_symmetry_space_group_name_H-M   'P -4 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            4
_cell_length_a                   17.9935(13)
_cell_length_b                   17.9935(13)
_cell_length_c                   7.2554(7)
_cell_measurement_temperature    90(1)
_cell_volume                     2349.1(3)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART CCD 1000'
_computing_data_reduction        SAINT
_computing_molecular_graphics    XP
_computing_publication_material  XCIF
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      90(1)
_diffrn_measured_fraction_theta_full 0.956
_diffrn_measured_fraction_theta_max 0.956
_diffrn_measurement_device_type  'SMART CCD 1000'
_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  0.0400
_diffrn_reflns_av_sigmaI/netI    0.0282
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            18737
_diffrn_reflns_theta_full        29.37
_diffrn_reflns_theta_max         29.37
_diffrn_reflns_theta_min         1.60
_exptl_absorpt_coefficient_mu    0.205
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.551
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1124
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.838
_refine_diff_density_min         -0.488
_refine_diff_density_rms         0.087
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(4)
_refine_ls_extinction_coef       0.0174(11)
_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   1.052
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         2998
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0721
_refine_ls_R_factor_gt           0.0649
_refine_ls_shift/su_max          0.114
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1122P)^2^+2.1535P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1816
_refine_ls_wR_factor_ref         0.1871
_reflns_number_gt                2627
_reflns_number_total             2998
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b306253h.txt
_cod_data_source_block           p-4n2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
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      P-4n2
_cod_original_formula_sum        'C20 H21 F6 N5 O4.50 P'
_cod_database_code               7103885