New crystalline form of 7-amino-4-methylcoumarin (coumarin 120)—a polymorph with 1 ∶ 1 valence tautomers
Niedziałek, Dorota; Urbanczyk-Lipkowska, Zofia; CrystEngComm 9 (2007) 735–; doi:10.1039/b707581b

data_7202959
_publ_section_title
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 New crystalline form of 7-amino-4-methylcoumarin (coumarin 120)---a
 polymorph with 1&#x2009;&#x2236;&#x2009;1 valence tautomers
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_journal_issue                   9
_journal_name_full               CrystEngComm
_journal_page_first              735
_journal_paper_doi               10.1039/b707581b
_journal_volume                  9
_journal_year                    2007
_chemical_formula_moiety         'C10 H9 N O2'
_chemical_formula_sum            'C10 H9 N O2'
_chemical_formula_weight         175.18
_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-97
_cell_angle_alpha                71.489(11)
_cell_angle_beta                 84.540(9)
_cell_angle_gamma                69.982(12)
_cell_formula_units_Z            2
_cell_length_a                   6.7981(8)
_cell_length_b                   7.1085(9)
_cell_length_c                   9.5555(10)
_cell_measurement_reflns_used    10000
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.7
_cell_measurement_theta_min      1.5
_cell_volume                     411.37(9)
_computing_cell_refinement       CrysAlisRED
_computing_data_collection       CrysAlisCCD
_computing_data_reduction        CrysAlisRED
_computing_molecular_graphics    'Diamond 2'
_computing_publication_material  SHELXTL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 1024
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  KM4CCD
_diffrn_measurement_method       'omega scan'
_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  0.0314
_diffrn_reflns_av_sigmaI/netI    0.0728
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            4808
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.19
_diffrn_standards_decay_%        2
_diffrn_standards_interval_count '50 frames'
_diffrn_standards_number         '1 frame'
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.414
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Planar
_exptl_crystal_F_000             184
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.154
_refine_diff_density_min         -0.194
_refine_diff_density_rms         0.038
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.740
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     154
_refine_ls_number_reflns         1451
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.740
_refine_ls_R_factor_all          0.0701
_refine_ls_R_factor_gt           0.0306
_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^)+(0.0292P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0546
_refine_ls_wR_factor_ref         0.0592
_reflns_number_gt                793
_reflns_number_total             1451
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b707581b.txt
_cod_data_source_block           C120_I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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
_cod_database_code               7202959