3,7,8-Trihydroxy-3-methyl-10-oxo-4,10-dihydro-1<i>H</i>,3<i>H</i>-pyrano[4,3-<i>b</i>]chromene-9-carboxylic acid (fulvic acid) methanol 0.75-solvate
Wang, Jian-Feng; Fang, Mei-Juan; Huang, Hui-Qiong; Li, Gui-Ling; Su, Wen-Jin; Zhao, Yu-Fen; Acta Crystallographica Section E 59 (2003) o1517–o1518; doi:10.1107/S1600536803020336

data_2202583
_publ_section_title
;3,7,8-Trihydroxy-3-methyl-10-oxo-4,10-dihydro-1<i>H</i>,3<i>H</i>-pyrano[4,3-<i>b</i>]chromene-9-carboxylic
 acid (fulvic acid) methanol 0.75-solvate
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1517
_journal_page_last               o1518
_journal_paper_doi               10.1107/S1600536803020336
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          'C14 H12 O8, 0.75C H4 O'
_chemical_formula_moiety         'C14 H12 O8, 0.75C H4 O'
_chemical_formula_sum            'C14.75 H15 O8.75'
_chemical_formula_weight         332.27
_chemical_name_common            'Fulvic acid'
_chemical_name_systematic
;
3,7,8-Trihydroxy-3-methyl-10-oxo-4,10-dihydro-1H,3H-pyrano[4,3-b]chromene-
9-carboxylic acid (fulvic acid)
;
_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                94.608(3)
_cell_angle_beta                 100.871(3)
_cell_angle_gamma                98.399(3)
_cell_formula_units_Z            8
_cell_length_a                   12.4830(7)
_cell_length_b                   12.6558(8)
_cell_length_c                   19.0259(13)
_cell_measurement_reflns_used    1065
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      19.4
_cell_measurement_theta_min      2.2
_cell_volume                     2902.1(3)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT (Bruker, 2001)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.927
_diffrn_measurement_device_type  'Bruker APEX area-detector'
_diffrn_measurement_method       '\f and \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  0.0518
_diffrn_reflns_av_sigmaI/netI    0.1254
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            14782
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.10
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.128
_exptl_absorpt_correction_T_max  0.9848
_exptl_absorpt_correction_T_min  0.9528
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2001)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.521
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             1388
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.411
_refine_diff_density_min         -0.308
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     873
_refine_ls_number_reflns         9473
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.1625
_refine_ls_R_factor_gt           0.0746
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         <0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0668P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1531
_refine_ls_wR_factor_ref         0.1958
_reflns_number_gt                4625
_reflns_number_total             9473
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            cv6232.cif
_cod_data_source_block           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 

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.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' 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_database_code               2202583
_cod_database_fobs_code          2202583