Bis(cycloheptylaminium) hydrogenarsenate monohydrate
Todd, Malcolm J.; Harrison, William T. A.; Acta Crystallographica Section E 61 (2005) m1024–m1026; doi:10.1107/S1600536805012912

data_2205959
_publ_section_title
;
 Bis(cycloheptylaminium) hydrogenarsenate monohydrate
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              m1024
_journal_page_last               m1026
_journal_paper_doi               10.1107/S1600536805012912
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          '2C7 H16 N +, H As O4 2-, H2 O'
_chemical_formula_moiety         '2C7 H16 N +, As H O4 2-, H2 O'
_chemical_formula_sum            'C14 H35 As N2 O5'
_chemical_formula_weight         386.36
_chemical_name_systematic
;
Bis(cycloheptylaminium) hydrogenarsenate monohydrate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   'difmap (O-H) and geom (others)'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 110.0396(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.5003(4)
_cell_length_b                   6.40050(10)
_cell_length_c                   20.1552(5)
_cell_measurement_reflns_used    4402
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     1878.53(7)
_computing_cell_refinement       COLLECT
_computing_data_collection       'COLLECT (Enraf-Nonius, 1999)'
_computing_data_reduction        COLLECT
_computing_molecular_graphics
'ORTEP-3 (Farrugia, 1997) and ATOMS (Shape Software, 1999)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\w and \f'
_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  0.0379
_diffrn_reflns_av_sigmaI/netI    0.0368
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            17560
_diffrn_reflns_theta_full        27.56
_diffrn_reflns_theta_max         27.56
_diffrn_reflns_theta_min         3.05
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.832
_exptl_absorpt_correction_T_max  0.810
_exptl_absorpt_correction_T_min  0.473
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.366
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.461
_refine_diff_density_min         -0.407
_refine_ls_extinction_coef       0.0027(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         4294
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0394
_refine_ls_R_factor_gt           0.0284
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0232P)^2^+1.7751P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0630
_refine_ls_wR_factor_ref         0.0681
_reflns_number_gt                3604
_reflns_number_total             4294
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hg6174.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2205959
_cod_database_fobs_code          2205959