Solvent-free synthesis of 3-carboxycoumarins
Scott, Janet L.; Raston, Colin L.; Green Chemistry 2 (2000) 245–; doi:10.1039/b006704k

data_7204029
_publ_section_title
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 Solvent-free synthesis of 3-carboxycoumarins
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_journal_issue                   5
_journal_name_full               'Green Chemistry'
_journal_page_first              245
_journal_paper_doi               10.1039/b006704k
_journal_volume                  2
_journal_year                    2000
_chemical_formula_moiety         'C11 H8 O5'
_chemical_formula_sum            'C11 H8 O5'
_chemical_formula_weight         220.17
_chemical_name_systematic
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8-methoxy,3-carboxy-coumarin
;
_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                 99.909(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.1100(2)
_cell_length_b                   19.5292(4)
_cell_length_c                   9.4299(3)
_cell_measurement_temperature    123(2)
_cell_volume                     927.01(5)
_computing_molecular_graphics    'ORTEP-3 for Windows v 1.05'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.933
_diffrn_measured_fraction_theta_max 0.933
_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  0.0296
_diffrn_reflns_av_sigmaI/netI    0.0453
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            4155
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         3.82
_exptl_absorpt_coefficient_mu    0.127
_exptl_absorpt_correction_T_max  0.9874
_exptl_absorpt_correction_T_min  0.9569
_exptl_crystal_colour            'very pale yellow '
_exptl_crystal_density_diffrn    1.578
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.484
_refine_diff_density_min         -0.275
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     146
_refine_ls_number_reflns         2151
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0690
_refine_ls_R_factor_gt           0.0437
_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^)+(0.0546P)^2^+0.3692P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1040
_refine_ls_wR_factor_ref         0.1157
_reflns_number_gt                1583
_reflns_number_total             2151
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b006704k.txt
_cod_data_source_block           compound4a
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' tag value 'monclinic' was replaced with
'monoclinic' value.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
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_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7204029