<i>cis</i>-<i>anti</i>-<i>cis</i>-Tricyclo[6.4.0.0^2,7^]dodecane-3,12-dione and <i>cis</i>-<i>anti</i>-<i>cis</i>-Tricyclo[6.4.0.0^2,7^]dodecane-3,9-dione
Angela Taylor; Edmund J. Eisenbraun; Clinton E. Browne; Elizabeth M. Holt; Acta Crystallographica Section C 53 (1997) 1963–1966; doi:10.1107/S0108270197011694

data_2006882
_publ_section_title
;
 <i>cis</i>-<i>anti</i>-<i>cis</i>-Tricyclo[6.4.0.0^2,7^]dodecane-3,12-dione
 and
 <i>cis</i>-<i>anti</i>-<i>cis</i>-Tricyclo[6.4.0.0^2,7^]dodecane-3,9-dione
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1963
_journal_page_last               1966
_journal_paper_doi               10.1107/S0108270197011694
_journal_volume                  53
_journal_year                    1997
_chemical_formula_moiety         'C12 H16 O2'
_chemical_formula_sum            'C12 H16 O2'
_chemical_formula_weight         192.2
_chemical_name_systematic
;
cis-anti-cis-tricyclo[6.4.0.0^2.7^]dodecane-3,12-dione
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_cell_angle_alpha                90.0
_cell_angle_beta                 90.0
_cell_angle_gamma                90.0
_cell_formula_units_Z            8
_cell_length_a                   10.703(2)
_cell_length_b                   10.9900(10)
_cell_length_c                   17.584(5)
_cell_measurement_reflns_used    63
_cell_measurement_temperature    298
_cell_measurement_theta_max      12.433
_cell_measurement_theta_min      3.694
_cell_volume                     2068.3(7)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Fait, 1991)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    'XP (Siemens, 1990)'
_computing_structure_refinement  'SHELXL97 (Sheldrick,1997)'
_computing_structure_solution    'SHELXS86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298
_diffrn_measurement_device_type  'Syntex P4 4-circle-diffractometer'
_diffrn_measurement_method       \q/2\q
_diffrn_radiation_monochromator  'highly oriented graphite crystal'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0773
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            2996
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.32
_diffrn_standards_decay_%        0.01
_diffrn_standards_interval_count '97 reflections'
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.236
_exptl_crystal_description       rhomb
_exptl_crystal_F_000             832
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.155
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.15
_refine_diff_density_min         -0.16
_refine_ls_extinction_coef       0.0013(3)
_refine_ls_extinction_method     SHELXL-97
_refine_ls_goodness_of_fit_ref   0.725
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         2336
_refine_ls_R_factor_gt           0.0590
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1363P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1562
_reflns_number_gt                852
_reflns_number_total             2336
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sx1038.cif
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.1363P)^2^] where P=(Fo^2^+2Fc^2^)/3' was changed
to 'calc'. New tag '_refine_ls_weighting_details' was created. The
value of the new tag was set to 'w=1/[\s^2^(Fo^2^)+(0.1363P)^2^]
where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               2006882