Enantiomeric Pairs of Meroterpenoids with Diverse Heterocyclic Systems from Rhododendron nyingchiense.
Huang, Guang-Hui; Hu, Zhu; Lei, Chun; Wang, Pei-Pei; Yang, Jing; Li, Jing-Ya; Li, Jia; Hou, Ai-Jun; Journal of natural products 81 (2018) 1810–1818; doi:10.1021/acs.jnatprod.8b00273

data_1553373
_publ_section_title
;
 Enantiomeric Pairs of Meroterpenoids with Diverse Heterocyclic Systems
 from Rhododendron nyingchiense.
;
_journal_issue                   8
_journal_name_full               'Journal of natural products'
_journal_page_first              1810
_journal_page_last               1818
_journal_paper_doi               10.1021/acs.jnatprod.8b00273
_journal_volume                  81
_journal_year                    2018
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C17 H22 O2'
_chemical_formula_sum            'C17 H22 O2'
_chemical_formula_weight         258.34
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2017-05-18
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5337)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.0879(4)
_cell_length_b                   8.0119(6)
_cell_length_c                   29.617(2)
_cell_measurement_reflns_used    7098
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      70.126
_cell_measurement_theta_min      2.984
_cell_volume                     1444.59(17)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.973
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0500
_diffrn_reflns_av_unetI/netI     0.0366
_diffrn_reflns_Laue_measured_fraction_full 0.973
_diffrn_reflns_Laue_measured_fraction_max 0.972
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            11826
_diffrn_reflns_point_group_measured_fraction_full 0.975
_diffrn_reflns_point_group_measured_fraction_max 0.973
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         70.120
_diffrn_reflns_theta_min         2.984
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.596
_exptl_absorpt_correction_T_max  0.7533
_exptl_absorpt_correction_T_min  0.5844
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1478 before and 0.0611 after correction. The Ratio of minimum to maximum transmission is 0.7758. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.188
_exptl_crystal_description       plate
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.01
_exptl_crystal_size_min          0.005
_refine_diff_density_max         0.226
_refine_diff_density_min         -0.196
_refine_diff_density_rms         0.052
_refine_ls_abs_structure_details
;
 Flack x determined using 937 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.16(10)
_refine_ls_extinction_coef       0.0035(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2016/6 (Sheldrick 2016)'
_refine_ls_goodness_of_fit_ref   1.105
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     178
_refine_ls_number_reflns         2683
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.105
_refine_ls_R_factor_all          0.0506
_refine_ls_R_factor_gt           0.0376
_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^)+(0.0750P)^2^+0.0620P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1115
_refine_ls_wR_factor_ref         0.1208
_reflns_Friedel_coverage         0.685
_reflns_Friedel_fraction_full    0.977
_reflns_Friedel_fraction_max     0.975
_reflns_number_gt                2410
_reflns_number_total             2683
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            np8b00273_si_004.cif
_cod_data_source_block           cu_d8v17001_0m
_cod_original_cell_volume        1444.57(17)
_cod_database_code               1553373
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.997
_shelx_estimated_absorpt_t_min   0.971
_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:
 C3(H3), C4(H4), C11(H11)
2.b Secondary CH2 refined with riding coordinates:
 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)
;
_shelx_res_checksum              27869
_shelx_hkl_checksum              2760
_olex2_submission_special_instructions 'No special instructions were received'