Five Pairs of Meroterpenoid Enantiomers from Rhododendron capitatum.
Liao, Hai-Bing; Huang, Guang-Hui; Yu, Mei-Hua; Lei, Chun; Hou, Ai-Jun; The Journal of organic chemistry 82 (2017) 1632–1637; doi:10.1021/acs.joc.6b02800

data_4032134
_publ_section_title
;
 Five Pairs of Meroterpenoid Enantiomers from Rhododendron capitatum.
;
_journal_issue                   3
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              1632
_journal_page_last               1637
_journal_paper_doi               10.1021/acs.joc.6b02800
_journal_volume                  82
_journal_year                    2017
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C17 H24 O3'
_chemical_formula_sum            'C17 H24 O3'
_chemical_formula_weight         276.36
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_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
_audit_creation_date             2016-06-17
_audit_creation_method
;
Olex2 1.2
(compiled 2016.02.19 svn.r3266 for OlexSys, GUI svn.r5155)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.27700(10)
_cell_length_b                   10.81480(10)
_cell_length_c                   19.2366(3)
_cell_measurement_reflns_used    7071
_cell_measurement_temperature    130
_cell_measurement_theta_max      69.45
_cell_measurement_theta_min      2.30
_cell_volume                     1513.91(3)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      130
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0471
_diffrn_reflns_av_unetI/netI     0.0440
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.983
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            9720
_diffrn_reflns_point_group_measured_fraction_full 0.981
_diffrn_reflns_point_group_measured_fraction_max 0.960
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         69.517
_diffrn_reflns_theta_min         4.597
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.649
_exptl_absorpt_correction_T_max  0.7532
_exptl_absorpt_correction_T_min  0.6058
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
wR2(int) was 0.1245 before and 0.0781 after correction.
The Ratio of minimum to maximum transmission is 0.8043.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.213
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.203
_refine_diff_density_min         -0.168
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details
;
 Flack x determined using 1074 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.05(9)
_refine_ls_extinction_coef       0.0120(12)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     188
_refine_ls_number_reflns         2729
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0347
_refine_ls_R_factor_gt           0.0343
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0501P)^2^+0.2914P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0931
_refine_ls_wR_factor_ref         0.0934
_reflns_Friedel_coverage         0.676
_reflns_Friedel_fraction_full    0.960
_reflns_Friedel_fraction_max     0.928
_reflns_number_gt                2693
_reflns_number_total             2729
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo6b02800_si_005.cif
_cod_data_source_block           cu_dm16373_0m
_cod_depositor_comments          'Adding full bibliography for 4032134.cif.'
_cod_database_code               4032134
_shelxl_version_number           2014-3
_shelx_estimated_absorpt_t_max   0.881
_shelx_estimated_absorpt_t_min   0.855
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
2.a Ternary CH refined with riding coordinates:
 C4(H4), C11(H11)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B), C9(H9A,H9B), C10(H10A,H10B)
2.c Aromatic/amide H refined with riding coordinates:
 C6(H6), C8(H8)
2.d Idealised Me refined as rotating group:
 C13(H13A,H13B,H13C), C14(H14A,H14B,H14C), C15(H15A,H15B,H15C), C16(H16A,H16B,
 H16C)
2.e Idealised tetrahedral OH refined as rotating group:
 O2(H2), O3(H3)
;
_shelx_res_checksum              10599
_shelx_hkl_checksum              19942
_olex2_submission_special_instructions 'No special instructions were received'