Crystal forms of highly “dynamic” 18-crown[6] complexes with M[HSO4] and M[H2PO4] (M+ = NH4+, Rb+, Cs+): thermal behaviour and solid-state preparation
Braga, Dario; Modena, Enrico; Polito, Marco; Rubini, Katia; Grepioni, Fabrizia; New Journal of Chemistry 32 (2008) 1718–; doi:10.1039/b805203d

data_7053746
_publ_section_title
;
 Crystal forms of highly &#x201C;dynamic&#x201D; 18-crown[6] complexes
 with M[HSO4] and M[H2PO4] (M+ = NH4+, Rb+, Cs+): thermal behaviour and
 solid-state preparation
;
_journal_issue                   10
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1718
_journal_paper_doi               10.1039/b805203d
_journal_volume                  32
_journal_year                    2008
_chemical_formula_sum            'C12 H31.5 O13 P0.5 Rb S0.5'
_chemical_formula_weight         500.86
_chemical_name_systematic
;
?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 101.00(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   19.802(4)
_cell_length_b                   8.447(4)
_cell_length_c                   25.777(7)
_cell_measurement_temperature    293(2)
_cell_volume                     4232(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0503
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2583
_diffrn_reflns_theta_full        21.98
_diffrn_reflns_theta_max         21.98
_diffrn_reflns_theta_min         3.19
_exptl_absorpt_coefficient_mu    2.486
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.572
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             2080
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.403
_refine_diff_density_min         -0.282
_refine_diff_density_rms         0.070
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.998
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         2583
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.998
_refine_ls_R_factor_all          0.0744
_refine_ls_R_factor_gt           0.0390
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0647P)^2^+8.0516P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1008
_refine_ls_wR_factor_ref         0.1124
_reflns_number_gt                1807
_reflns_number_total             2583
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b805203dsup1.cif
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_original_formula_sum        'C12 H31.50 O13 P0.50 Rb S0.50'
_cod_database_code               7053746