({-})-Kolavenic acid
Zukerman-Schpector, Julio; Sousa Madureira, Lucas; Messiano, Gisele B.; Lopes, Lucia M. X.; Tiekink, Edward R. T.; Acta Crystallographica Section E 64 (2008) o1114–; doi:10.1107/S1600536808014402

data_2218483
_publ_section_title
;
 ({-})-Kolavenic acid
;
_journal_coeditor_code           NG2455
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1114
_journal_paper_doi               10.1107/S1600536808014402
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C20 H32 O2'
_chemical_formula_moiety         'C20 H32 O2'
_chemical_formula_sum            'C20 H32 O2'
_chemical_formula_weight         304.46
_chemical_name_common            '(-)-Kolavenic acid'
_chemical_name_systematic
;
(<i>E</i>)-3-methyl-5-(1,2,4a,5-tetramethyl-1,2,3,4,4a,7,8,8a-\
octahydronaphthalen-1-yl)pent-2-enoic acid
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.5122(3)
_cell_length_b                   15.5439(4)
_cell_length_c                   19.1969(4)
_cell_measurement_reflns_used    9536
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      21.8
_cell_measurement_theta_min      2.3
_cell_volume                     3733.57(15)
_computing_cell_refinement       'SAINT (Bruker, 2006)'
_computing_data_collection       'APEX2, COSMO and BIS (Bruker, 2006)'
_computing_data_reduction        'SAINT (Bruker, 2006)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 2006)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR97 (Altomare <i>et al.</i>, 1999)'
_diffrn_ambient_temperature      291(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEXII CCD 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  0.052
_diffrn_reflns_av_sigmaI/netI    0.047
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            48366
_diffrn_reflns_theta_full        30.5
_diffrn_reflns_theta_max         30.5
_diffrn_reflns_theta_min         2.7
_diffrn_standards_decay_%        '< 1'
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.067
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.083
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             1344
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.11
_refine_diff_density_min         -0.12
_refine_ls_abs_structure_details 'Friedel pairs were merged'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.998
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     407
_refine_ls_number_reflns         6240
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.998
_refine_ls_R_factor_all          0.122
_refine_ls_R_factor_gt           0.050
_refine_ls_shift/su_max_lt       0.001
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0656P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.110
_refine_ls_wR_factor_ref         0.134
_reflns_number_gt                3146
_reflns_number_total             6240
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ng2455.cif
_cod_data_source_block           I
_cod_database_code               2218483
_cod_database_fobs_code          2218483