Stabilisation of sodium complexes of 18-crown-6 by intramolecular hydrogen bonding †
Steed, Jonathan W.; Junk, Peter C.; Journal of the Chemical Society, Dalton Transactions  (1999) 2141–; doi:10.1039/a902358e

data_7027420
_publ_section_title
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 Stabilisation of sodium complexes of 18-crown-6 by intramolecular
 hydrogen bonding&#x200A;&#x2020;
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_journal_issue                   13
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              2141
_journal_paper_doi               10.1039/a902358e
_journal_year                    1999
_chemical_formula_sum            'C12 H28 N3 Na O8'
_chemical_formula_weight         365.36
_chemical_name_systematic
; 
 ? 
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_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                67.8250(10)
_cell_angle_beta                 76.1130(10)
_cell_angle_gamma                67.5510(10)
_cell_formula_units_Z            2
_cell_length_a                   9.5186(8)
_cell_length_b                   10.4064(9)
_cell_length_c                   11.0250(6)
_cell_measurement_temperature    123(2)
_cell_volume                     928.78(12)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.928
_diffrn_measured_fraction_theta_max 0.928
_diffrn_measurement_device_type  KappaCCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0254
_diffrn_reflns_av_sigmaI/netI    0.0498
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5761
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         3.24
_exptl_absorpt_coefficient_mu    0.127
_exptl_absorpt_correction_T_max  0.9750
_exptl_absorpt_correction_T_min  0.9392
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.306
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.410
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.049
_refine_ls_extinction_coef       0.070(13)
_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   1.063
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         3388
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0892
_refine_ls_R_factor_gt           0.0606
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0644P)^2^+0.7419P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1611
_refine_ls_wR_factor_ref         0.1824
_reflns_number_gt                1998
_reflns_number_total             3388
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            902358esup1.cif
_cod_data_source_block           nan318
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0644P)^2^+0.7419P] 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^)+(0.0644P)^2^+0.7419P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
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_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7027420