(–)-2-(1,2,3,4,4a,5,6,7,8,8aα-Decahydro-4aβ,8α-dimethyl-7-oxo-2β-naphthyl)propionic acid: catemeric hydrogen bonding in a bicyclic sesquiterpenoid ζ-keto acid
Thompson, Hugh W.; Lalancette, Roger A.; Acta Crystallographica Section C 59 (2003) o580–o582; doi:10.1107/S0108270103018997

data_2013585
_publ_section_title
;(--)-2-(1,2,3,4,4a,5,6,7,8,8a\a-Decahydro-4a\b,8\a-dimethyl-7-oxo-2\b-naphthyl)propionic
 acid: catemeric hydrogen bonding in a bicyclic sesquiterpenoid \z-keto acid
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o580
_journal_page_last               o582
_journal_paper_doi               10.1107/S0108270103018997
_journal_volume                  59
_journal_year                    2003
_chemical_formula_moiety         'C15 H24 O3'
_chemical_formula_sum            'C15 H24 O3'
_chemical_formula_weight         252.34
_chemical_melting_point          384
_chemical_name_systematic
;
(-)-2-(1,2,3,4,4a,5,6,7,8,8a\a-decahydro-4a\b,8\a-dimethyl-
7-oxo-2\b-naphthyl)propionic acid
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90
_cell_angle_beta                 111.36(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.136(3)
_cell_length_b                   14.867(4)
_cell_length_c                   10.238(3)
_cell_measurement_reflns_used    28
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      10.5
_cell_measurement_theta_min      2.1
_cell_volume                     1436.8(7)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1996)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    'SHELXP97 in SHELXTL (Sheldrick, 1997)'
_computing_publication_material  'SHELXL97 in SHELXTL'
_computing_structure_refinement  'SHELXL97 in SHELXTL (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 in SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Siemens P4'
_diffrn_measurement_method       2\q/\q
_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  0.060
_diffrn_reflns_av_sigmaI/netI    0.081
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            5322
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.14
_diffrn_standards_decay_%        'variation < 4.0'
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.96
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   '(SHELXTL; Sheldrick, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.167
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parellelepiped
_exptl_crystal_F_000             552
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.14
_refine_diff_density_min         -0.13
_refine_ls_extinction_coef       0.0114(17)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 in SHELXTL (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.05
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     328
_refine_ls_number_reflns         2590
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.05
_refine_ls_R_factor_all          0.117
_refine_ls_R_factor_gt           0.055
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         0.00
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0354P)^2^+0.1319P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.097
_refine_ls_wR_factor_ref         0.120
_reflns_number_gt                1462
_reflns_number_total             2590
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fr1424.cif
_cod_data_source_block           I
_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.

'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (4 times).

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.

'_geom_bond_publ_flag' value 'Y' changed to 'y'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29 (4
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (4 times).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               2013585
_cod_database_fobs_code          2013585