Design Criteria for Ionic Liquid Crystalline Phases of Phosphonium Salts with Three Equivalent Longn-Alkyl Chains
Kefeng Ma; Kwang-Ming Lee; Liliya Minkova; Richard G. Weiss; Journal of Organic Chemistry 74 (2009) 2088–2098; doi:10.1021/jo802605k

data_4024378
_publ_section_title
;
Design Criteria for Ionic Liquid Crystalline Phases of Phosphonium Salts
with Three Equivalent Longn-Alkyl Chains
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2088
_journal_page_last               2098
_journal_paper_doi               10.1021/jo802605k
_journal_volume                  74
_journal_year                    2009
_chemical_formula_sum            'C44 H90 Br O2 P'
_chemical_formula_weight         762.04
_chemical_name_systematic
; 
 carboxymethyl-tri-n-tetradecylphosphonium bromide 
;
_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                 100.015(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.004(12)
_cell_length_b                   14.111(8)
_cell_length_c                   15.110(8)
_cell_measurement_temperature    173(2)
_cell_volume                     4620(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.956
_diffrn_measured_fraction_theta_max 0.956
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.3143
_diffrn_reflns_av_sigmaI/netI    1.0488
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            28869
_diffrn_reflns_theta_full        28.47
_diffrn_reflns_theta_max         28.47
_diffrn_reflns_theta_min         0.94
_exptl_absorpt_coefficient_mu    0.956
_exptl_absorpt_correction_T_max  0.8350
_exptl_absorpt_correction_T_min  0.6748
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            clear
_exptl_crystal_density_diffrn    1.095
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1680
_refine_diff_density_max         0.262
_refine_diff_density_min         -0.587
_refine_diff_density_rms         0.065
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.551
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     437
_refine_ls_number_reflns         11161
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.551
_refine_ls_R_factor_all          0.3876
_refine_ls_R_factor_gt           0.0484
_refine_ls_shift/su_max          0.076
_refine_ls_shift/su_mean         0.013
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0576P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0995
_refine_ls_wR_factor_ref         0.1709
_reflns_number_gt                1633
_reflns_number_total             11161
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo802605k_si_002.cif
_cod_data_source_block           001
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4024378