Switchable Dielectric Phase Transition Induced by Ordering of Twisting Motion in 1,4-Diazabicyclo[2.2.2]octane Chlorodifluoroacetate
Shi, Xiaojun; Luo, Junhua; Sun, Zhihua; Li, Shigeng; Ji, Chengmin; Li, Lina; Han, Liang; Zhang, Shuquan; Yuan, Daqiang; Hong, Maochun; Crystal Growth & Design 13 (2013) 2081–; doi:10.1021/cg400146b

data_4507716
_publ_section_title
;
 Switchable Dielectric Phase Transition Induced by Ordering of Twisting
 Motion in 1,4-Diazabicyclo[2.2.2]octane Chlorodifluoroacetate
;
_journal_issue                   5
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              2081
_journal_paper_doi               10.1021/cg400146b
_journal_volume                  13
_journal_year                    2013
_chemical_formula_sum            'C8 H13 Cl F2 N2 O2'
_chemical_formula_weight         242.65
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.123(5)
_cell_length_b                   9.135(7)
_cell_length_c                   19.405(16)
_cell_measurement_temperature    293(2)
_cell_volume                     1085.4(15)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_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  0.0271
_diffrn_reflns_av_sigmaI/netI    0.0147
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            6061
_diffrn_reflns_theta_full        24.50
_diffrn_reflns_theta_max         24.50
_diffrn_reflns_theta_min         2.10
_exptl_absorpt_coefficient_mu    0.363
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.5795
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.485
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.2000
_exptl_crystal_size_mid          0.2000
_exptl_crystal_size_min          0.2000
_refine_diff_density_max         0.489
_refine_diff_density_min         -0.650
_refine_diff_density_rms         0.071
_refine_ls_extinction_coef       0.030(16)
_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   1.109
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     113
_refine_ls_number_reflns         949
_refine_ls_number_restraints     10
_refine_ls_restrained_S_all      1.190
_refine_ls_R_factor_all          0.0930
_refine_ls_R_factor_gt           0.0888
_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^)+(0.1482P)^2^+1.2700P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2636
_refine_ls_wR_factor_ref         0.2684
_reflns_number_gt                873
_reflns_number_total             949
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg400146b_si_002.cif
_cod_data_source_block           d:\collab~1\luojun~1\sxj-24~3\sxj-24~1\x
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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      Pnma
_cod_database_code               4507716