5-Formyl-2,3-dihydroisocoumarin
Zamarrud; Viqar Uddin Ahmad; Shazia Anjum; M. Qaiser; Acta Crystallographica Section E 62 (2006) o405–o407; doi:10.1107/S1600536805042558

data_2208198
_publ_section_title
;
 5-Formyl-2,3-dihydroisocoumarin
;
_journal_coeditor_code           WN6408
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o405
_journal_page_last               o407
_journal_paper_doi               10.1107/S1600536805042558
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C10 H8 O3'
_chemical_formula_moiety         'C10 H8 O3'
_chemical_formula_sum            'C10 H8 O3'
_chemical_formula_weight         176.16
_chemical_melting_point          413.5(5)
_chemical_name_common            Erythrocentaurin
_chemical_name_systematic
;
5-Formyl-2,3-dihydroisocoumarin
;
_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                 100.337(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.651(3)
_cell_length_b                   4.0197(14)
_cell_length_c                   26.701(9)
_cell_measurement_reflns_used    2249
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      1.5
_cell_volume                     807.9(5)
_computing_cell_refinement       'SAINT  (Siemens,  1996)'
_computing_data_collection       'SMART  (Siemens, 1996)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  'SHELXTL and PLATON (Spek, 2003)'
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Siemens SMART CCD area-detector'
_diffrn_measurement_method       \w
_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  0.0307
_diffrn_reflns_av_sigmaI/netI    0.0405
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            4155
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.55
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.9925
_exptl_absorpt_correction_T_min  0.9612
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.448
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             368
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.186
_refine_diff_density_min         -0.227
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.169
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     118
_refine_ls_number_reflns         1573
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.169
_refine_ls_R_factor_all          0.0899
_refine_ls_R_factor_gt           0.0686
_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^)+(0.0527P)^2^+0.2194P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1332
_refine_ls_wR_factor_ref         0.1426
_reflns_number_gt                1151
_reflns_number_total             1573
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            wn6408.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.

'_geom_hbond_publ_flag' value 'Y' changed to 'y' 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:

'_chemical_melting_point' value '413--414' was changed to '413.5(5)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value '413--414' was changed to '413.5(5)'
- the average value was taken and precision was
estimated.

'_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.

'_geom_hbond_publ_flag' value 'Y' changed to 'y'
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 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2208198
_cod_database_fobs_code          2208198