Structural Studies of a Series of Organic Non-Linear Optical Materials
Cole, J. C.; Cole, J. M.; Cross, G. H.; Farsari, M.; Howard, J. A. K.; Szablewski, M.; Acta Crystallographica Section B 53 (1997) 812–821; doi:10.1107/S010876819601525X

data_2101907
_publ_section_title
;
 Structural Studies of a Series of Organic Non-Linear Optical Materials
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              812
_journal_page_last               821
_journal_paper_doi               10.1107/S010876819601525X
_journal_volume                  53
_journal_year                    1997
_chemical_formula_sum            'C18 H24 N4'
_chemical_formula_weight         296.41
_chemical_name_systematic
;
 ?
;
_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'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 112.11(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.262(2)
_cell_length_b                   12.867(3)
_cell_length_c                   12.510(3)
_cell_measurement_reflns_used    49
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      10.8
_cell_measurement_theta_min      6.9
_cell_volume                     1679.5(7)
_computing_cell_refinement       'XSCANS (Siemens, 1994)'
_computing_data_collection       'XSCANS (Siemens, 1994)'
_computing_data_reduction        'XSCANS (Siemens, 1994)'
_computing_molecular_graphics    SHELXTL-PLUS
_computing_publication_material  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measurement_device       'Siemens P4 diffractometer'
_diffrn_measurement_method       '2\q/\w 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  0.0370
_diffrn_reflns_av_sigmaI/netI    0.1057
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            3758
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.37
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.072
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.172
_exptl_crystal_description       block
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.20
_refine_diff_density_max         .129
_refine_diff_density_min         -.208
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.764
_refine_ls_goodness_of_fit_obs   0.962
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     295
_refine_ls_number_reflns         2949
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.764
_refine_ls_restrained_S_obs      0.962
_refine_ls_R_factor_all          0.0961
_refine_ls_R_factor_obs          0.0374
_refine_ls_shift/esd_max         -0.041
_refine_ls_shift/esd_mean        0.005
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0249P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0700
_refine_ls_wR_factor_obs         0.0607
_reflns_number_observed          1550
_reflns_number_total             2949
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            an0521.cif
_cod_data_source_block           I
_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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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 

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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0249P)^2^+0.0000P] 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^)+(0.0249P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        1679.5(6)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2101907