Diiminoisoindoline: tautomerism, conformations, and polymorphism.
Zhang, Zhi-Qin; Njus, Jeffrey M; Sandman, Daniel J; Guo, Chengyun; Foxman, Bruce M; Erk, Peter; van Gelder, Richard; Chemical communications (Cambridge, England)  (2004) 886–887; doi:10.1039/b400111g

data_7102556
_publ_section_title
;
 Diiminoisoindoline: tautomerism, conformations, and polymorphism.
;
_journal_issue                   7
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              886
_journal_page_last               887
_journal_paper_doi               10.1039/b400111g
_journal_year                    2004
_chemical_compound_source
;
?
;
_chemical_formula_moiety         ' C16 H14 N6 '
_chemical_formula_sum            'C16 H14 N6'
_chemical_formula_weight         290.33
_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
_audit_creation_date             03-25-11
_audit_creation_method           CRYSTALS_ver_12-03-99
_cell_angle_alpha                90
_cell_angle_beta                 102.916(11)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.8323(16)
_cell_length_b                   7.0661(7)
_cell_length_c                   19.696(3)
_cell_measurement_reflns_used    24
_cell_measurement_temperature    294
_cell_measurement_theta_max      47
_cell_measurement_theta_min      24
_cell_volume                     1469.4(3)
_computing_cell_refinement
;
Cad4 Express, (Straver, 1992)
;
_computing_data_collection
;
Cad4 Express, (Straver, 1992)
;
_computing_data_reduction
;
MolEN (Fair, 1990)
;
_computing_molecular_graphics
;
CAMERON (Watkin et al 1996)
;
_computing_publication_material
;
CRYSTALS (Watkin et al 2003)
;
_computing_structure_refinement
;
CRYSTALS (Watkin et al 2003)
;
_computing_structure_solution
;
SIR92 (Altomare et al, 1994)
;
_diffrn_ambient_temperature      294
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type
;
Enraf-Nonius CAD4
;
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.04
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            3186
_diffrn_reflns_theta_full        76.631
_diffrn_reflns_theta_max         76.631
_diffrn_reflns_theta_min         4.187
_diffrn_standards_decay_%        0.00
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.677
_exptl_absorpt_correction_T_max  0.91
_exptl_absorpt_correction_T_min  0.82
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details
;
Azimutal absorption correction (North et al, 1968)
;
_exptl_crystal_colour            ' colorless '
_exptl_crystal_density_diffrn    1.312
_exptl_crystal_description       ' prism '
_exptl_crystal_F_000             608
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.29
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.15
_refine_diff_density_min         -0.16
_refine_ls_extinction_coef       43(6)
_refine_ls_extinction_method     'Larson 1970 Crystallographic Computing eq 22'
_refine_ls_goodness_of_fit_ref   1.0812
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     224
_refine_ls_number_reflns         2319
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0571
_refine_ls_R_factor_gt           0.0376
_refine_ls_shift/su_max          0.000790
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982)
[weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)]
where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax
Method = Robust Weighting (Prince, 1982)
W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^
A~i~ are:
1.92 1.45 1.37
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0778
_refine_ls_wR_factor_gt          0.0463
_refine_ls_wR_factor_ref         0.0463
_reflns_limit_h_max              13
_reflns_limit_h_min              -13
_reflns_limit_k_max              8
_reflns_limit_k_min              0
_reflns_limit_l_max              24
_reflns_limit_l_min              0
_reflns_number_gt                2319
_reflns_number_total             3092
_reflns_threshold_expression     I>1.96u(I)
_cod_data_source_file            b400111g.txt
_cod_data_source_block           Form_A
_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      'P 1 21/c 1 '
_cod_original_formula_sum        ' C16 H14 N6 '
_cod_database_code               7102556