Combined X-ray Diffraction and 15N CPMAS NMR Study of Molecular Structure and Proton Order/Disorder Phenomena in Cyclic N,N'-Bisarylformamidine Dimers
Romana Anulewicz; Iwona Wawer; Tadeusz Marek Krygowski; Ferdinand Männle; Hans-Heinrich Limbach; Journal of the American Chemical Society 119 (1997) 12223–12230; doi:10.1021/ja970699h

data_4117079
_publ_section_title
;
 Combined X-ray Diffraction and 15N CPMAS NMR Study of Molecular Structure
 and Proton Order/Disorder Phenomena in Cyclic N,N'-Bisarylformamidine
 Dimers
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_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12223
_journal_page_last               12230
_journal_paper_doi               10.1021/ja970699h
_journal_volume                  119
_journal_year                    1997
_chemical_formula_sum            'C13 H10 F2 N2'
_chemical_formula_weight         232.23
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                69.51(3)
_cell_angle_beta                 65.70(3)
_cell_angle_gamma                72.12(3)
_cell_formula_units_Z            4
_cell_length_a                   10.882(2)
_cell_length_b                   10.930(2)
_cell_length_c                   11.326(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      16
_cell_volume                     1128.9(5)
_computing_cell_refinement       'KM-4 KUMA software (KUMA DIffraction, 1991)'
_computing_data_collection       'KM-4 KUMA software (KUMA Diffraction, 1991)'
_computing_data_reduction        'KM-4 KUMA software (KUMA DIffraction, 1991)'
_computing_molecular_graphics    'SHELXL/PC (Sheldrick, 1990)'
_computing_publication_material  'SHELXL93 (SHELDRICK, 1993)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'KM-4 diffractometer'
_diffrn_measurement_method       omega/theta
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0364
_diffrn_reflns_av_sigmaI/netI    0.0223
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            3748
_diffrn_reflns_theta_max         65.10
_diffrn_reflns_theta_min         4.40
_diffrn_standards_decay_%        5%
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.892
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.366
_exptl_crystal_F_000             480
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.164
_refine_diff_density_min         -0.207
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.928
_refine_ls_goodness_of_fit_obs   0.947
_refine_ls_matrix_type           full
_refine_ls_number_parameters     339
_refine_ls_number_reflns         3506
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.987
_refine_ls_restrained_S_obs      0.947
_refine_ls_R_factor_all          0.0655
_refine_ls_R_factor_obs          0.0455
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0779P)^2^+0.4590P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1383
_refine_ls_wR_factor_obs         0.1156
_reflns_number_observed          2706
_reflns_number_total             3530
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            ja970699h_2.cif
_cod_data_source_block           N,N-bis(p-fluorophenyl)-formamidine
_cod_depositor_comments
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The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0779P)^2^+0.4590P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0779P)^2^+0.4590P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
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_cod_original_cell_volume        1128.9(4)
_cod_database_code               4117079