<i>trans</i>-4,4a,6,7,8,8a-Hexahydro-8a-methylnaphtho[2,3-<i>b</i>]furan-5,9(5<i>H</i>,9<i>H</i>)-dione
Ray, J. K.; Kar, G. K.; Nigam, G. D.; Sivakumar, K.; Fun, H.-K.; Acta Crystallographica Section C 51 (1995) 2090–2092; doi:10.1107/S010827019500535X

data_2003984
_publ_section_title
<i>trans</i>-4,4a,6,7,8,8a-Hexahydro-8a-methylnaphtho[2,3-<i>b</i>]furan-5,9(5<i>H</i>,9<i>H</i>)-dione
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2090
_journal_page_last               2092
_journal_paper_doi               10.1107/S010827019500535X
_journal_volume                  51
_journal_year                    1995
_chemical_compound_source
;
;
_chemical_formula_sum            'C13 H14 O3'
_chemical_formula_weight         218.24
_chemical_name_systematic
;
trans-9-Methyl-1,5-dioxofuro[2,3-b]decalin
;
_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'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 105.73(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.119(1)
_cell_length_b                   7.821(1)
_cell_length_c                   12.107(1)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      8
_cell_volume                     1104.6(2)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1994)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    'SHELXTL/PC (Sheldrick, 1990)'
_computing_publication_material  SHELXL93
_computing_structure_refinement  'SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS86 (Sheldrick, 1985)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Siemens P4 diffractometer'
_diffrn_measurement_method       '\q/2\q scans'
_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  0.0175
_diffrn_reflns_av_sigmaI/netI    0.0282
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            3245
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.75
_diffrn_standards_decay_%        <4
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.312
_exptl_crystal_description       'thin plates'
_exptl_crystal_F_000             464
_exptl_crystal_size_max          0.64
_exptl_crystal_size_mid          0.60
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.163
_refine_diff_density_min         -0.203
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.999
_refine_ls_goodness_of_fit_obs   1.143
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     201
_refine_ls_number_reflns         2497
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.999
_refine_ls_restrained_S_obs      1.143
_refine_ls_R_factor_all          0.0600
_refine_ls_R_factor_obs          0.0424
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_scheme
;calc w = 1/[\s^2^(Fo^2^) + (0.0740P)^2^ + 0.0000P]
where P = (Fo^2^ + 2Fc^2^)/3
;
_refine_ls_wR_factor_all         0.1209
_refine_ls_wR_factor_obs         0.1135
_reflns_number_observed          1743
_reflns_number_total             2497
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            as1184.cif
_cod_data_source_block           924a
_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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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 '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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

'_geom_bond_publ_flag'
value 'Yes' changed to 'yes' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (18
times).

'_geom_angle_publ_flag' value 'Yes' changed to 'yes'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29 (28
times).

'_geom_torsion_publ_flag' value 'Yes' changed to 'yes'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29 (12
times).

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               2003984