Proton Disorder in NH···N Bonded [dabcoH]+I−Relaxor: New Insights into H-Disordering in a One-Dimensional H2O Ice Analogue
Szafrański, Marek; Katrusiak, Andrzej; McIntyre, Garry J.; Crystal Growth & Design 10 (2010) 4334–; doi:10.1021/cg100247g

data_4501698
_publ_section_title
;
 Proton Disorder in NH&#x00B7;&#x00B7;&#x00B7;N Bonded
 [dabcoH]+I&#x2212;Relaxor: New Insights into H-Disordering in a
 One-Dimensional H2O Ice Analogue
;
_journal_issue                   10
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              4334
_journal_paper_doi               10.1021/cg100247g
_journal_volume                  10
_journal_year                    2010
_chemical_formula_sum            'C6 H13 I N2'
_chemical_formula_weight         240.09
_chemical_name_common            'dabco hydroiodide'
_chemical_name_systematic
; 
 1,4-diazabicyclo[2.2.2]octane hydroiodide 
;
_space_group_IT_number           187
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P -6 2'
_symmetry_space_group_name_H-M   'P -6 m 2'
_atom_sites_solution_hydrogens   difmap
_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                120.00
_cell_formula_units_Z            1
_cell_length_a                   7.0217(10)
_cell_length_b                   7.0217(10)
_cell_length_c                   5.3196(11)
_cell_measurement_reflns_used    270
_cell_measurement_temperature    6.0(2)
_cell_measurement_theta_max      48.39
_cell_measurement_theta_min      3.90
_cell_volume                     227.14(7)
_computing_cell_refinement       'RAFD9 (local program)'
_computing_data_collection       'MAD (Barthelemy, 1984)'
_computing_data_reduction        'RACER (Wilkinson et al, 1988), D15ABS'
_computing_molecular_graphics    'SHELXTL-PLUS (Sheldrick, 1995)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      6.0(2)
_diffrn_detector_area_resol_mean '0.3 deg'
_diffrn_measured_fraction_theta_full 0.547
_diffrn_measured_fraction_theta_max 0.547
_diffrn_measurement_device_type  'diffractometer D9 in normal-beam mode'
_diffrn_measurement_method       '\w-x-\q scans'
_diffrn_radiation_monochromator  'Cu(220) crystal in transmission'
_diffrn_radiation_probe          neutron
_diffrn_radiation_source
'HFR at the Institut Laue Langevin reactor, Grenoble'
_diffrn_radiation_type           'hot neutrons'
_diffrn_radiation_wavelength     0.8372(2)
_diffrn_reflns_av_R_equivalents  0.0340
_diffrn_reflns_av_sigmaI/netI    0.0286
_diffrn_reflns_limit_h_max       3
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            359
_diffrn_reflns_theta_full        49.84
_diffrn_reflns_theta_max         49.84
_diffrn_reflns_theta_min         3.92
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 50
_diffrn_standards_number         1
_exptl_absorpt_coefficient_mu    '0.20823 mm-1'
_exptl_absorpt_correction_T_max  0.7092
_exptl_absorpt_correction_T_min  0.5794
_exptl_absorpt_correction_type
'Gaussian integration using calculated mu = 0.20823 mm-1'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.756
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'trapezoidal plate'
_exptl_crystal_F_000             15.3
_exptl_crystal_size_max          3.1
_exptl_crystal_size_mid          1.8
_exptl_crystal_size_min          1.8
_refine_diff_density_max         0.966
_refine_diff_density_min         -0.566
_refine_diff_density_rms         0.125
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0
_refine_ls_extinction_coef       0.005(18)
_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   1.143
_refine_ls_hydrogen_treatment    'refined with anisotropic Uij'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     25
_refine_ls_number_reflns         216
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.143
_refine_ls_R_factor_all          0.0305
_refine_ls_R_factor_gt           0.0285
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0151P)^2^+1.0585P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0639
_refine_ls_wR_factor_ref         0.0656
_reflns_number_gt                209
_reflns_number_total             216
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg100247g_si_002.cif
_cod_data_source_block           dabcoHI6_@_6.0_K_dhi04
_cod_original_sg_symbol_H-M      P-6m2
_cod_database_code               4501698