Do Secondary and Tertiary Ammonium Cations Act as Structure-Directing Agents in the Formation of Layered Uranyl Selenites?
Philip M. Almond; Thomas E. Albrecht-Schmitt; Inorganic Chemistry 42 (2003) 5693–5698; doi:10.1021/ic034308d

data_4314178
_publ_contact_author
;
Prof. Thomas E. Albrecht-Schmitt 
179 Chemistry Building
Department of Chemistry
Auburn University, AL
36849
;
_publ_contact_author_email       ' albreth@auburn.edu '
_publ_contact_author_fax         ' 334 844 6959 '
_publ_contact_author_phone       ' 334 844 6948 '
_publ_section_title
;
 Do Secondary and Tertiary Ammonium Cations Act as Structure-Directing
 Agents in the Formation of Layered Uranyl Selenites?
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5693
_journal_page_last               5698
_journal_paper_doi               10.1021/ic034308d
_journal_volume                  42
_journal_year                    2003
_chemical_formula_sum            'C2 H6 N O8 Se2 U'
_chemical_formula_weight         568.03
_chemical_name_systematic
; 
 ? 
;
_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                 90.3040(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.9378(5)
_cell_length_b                   8.6903(4)
_cell_length_c                   9.9913(5)
_cell_measurement_reflns_used    ALL
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      28.30
_cell_measurement_theta_min      1.86
_cell_volume                     949.69(8)
_computing_cell_refinement       'SMART, SAINT'
_computing_data_collection       SMART
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXP-97 (Sheldrick, 1997)'
_computing_publication_material  'SHELXCIF-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX'
_diffrn_measurement_method       '0.3 wide w/exposures'
_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  0.0388
_diffrn_reflns_av_sigmaI/netI    0.0323
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            9315
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         1.86
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count na
_diffrn_standards_interval_time  na
_diffrn_standards_number         na
_exptl_absorpt_coefficient_mu    24.777
_exptl_absorpt_correction_T_max  '0.767977 RATIO MIN/MAX'
_exptl_absorpt_correction_T_min  '0.767977 RATIO MIN/MAX'
_exptl_absorpt_process_details   'FACE-INDEXED ANALYTICAL, MULTISCAN SADABS'
_exptl_crystal_colour            YELLOW
_exptl_crystal_density_diffrn    3.973
_exptl_crystal_density_meas      CALCD
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       TABLET
_exptl_crystal_F_000             996
_exptl_crystal_size_max          0.170
_exptl_crystal_size_mid          0.160
_exptl_crystal_size_min          0.038
_refine_diff_density_max         1.275
_refine_diff_density_min         -1.277
_refine_diff_density_rms         0.210
_refine_ls_extinction_coef       0.00000(10)
_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   1.042
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     144
_refine_ls_number_reflns         2364
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0212
_refine_ls_R_factor_gt           0.0194
_refine_ls_shift/su_max          0.677
_refine_ls_shift/su_mean         0.006
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0281P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0510
_refine_ls_wR_factor_ref         0.0515
_reflns_number_gt                2202
_reflns_number_total             2364
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic034308dsi20030708_112124_1.cif
_cod_data_source_block           PIPERAZINE
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'MONOCLINIC' changed to 'monoclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_database_code               4314178