A polymorphic form of 4,4-dimethyl-8-methylene-3-azabicyclo[3.3.1]non-2-en-2-yl 3-indolyl ketone, an indole alkaloid extracted from <i>Aristotelia chilensis</i> (maqui)
Paz, Cristian; Becerra, José; Silva, Mario; Freire, Eleonora; Baggio, Ricardo; Acta Crystallographica Section C 69 (2013) 1509–1512; doi:10.1107/S0108270113025523

data_2019303
_publ_section_title
;
 A polymorphic form of
 4,4-dimethyl-8-methylene-3-azabicyclo[3.3.1]non-2-en-2-yl 3-indolyl
 ketone, an indole alkaloid extracted from <i>Aristotelia chilensis</i>
 (maqui)
;
_journal_coeditor_code           KU3113
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1509
_journal_page_last               1512
_journal_paper_doi               10.1107/S0108270113025523
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C20 H22 N2 O'
_chemical_formula_moiety         'C20 H22 N2 O'
_chemical_formula_sum            'C20 H22 N2 O'
_chemical_formula_weight         306.40
_chemical_name_systematic
(4,4-Dimethyl-8-methylene-3-azabicyclo[3.3.1]non-2-en-2-yl)(1<i>H</i>-indol-3-yl)methanone
_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           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.7841(5)
_cell_length_b                   12.3479(7)
_cell_length_c                   13.8639(5)
_cell_measurement_reflns_used    1161
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      28.78
_cell_measurement_theta_min      3.89
_cell_volume                     1674.94(14)
_computing_cell_refinement       'CrysAlisPro (Oxford Diffraction, 2009)'
_computing_data_collection       'CrysAlisPro (Oxford Diffraction, 2009)'
_computing_data_reduction        'CrysAlisPro (Oxford Diffraction, 2009)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
;
SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.883
_diffrn_measurement_device_type  'Oxford Gemini S Ultra CCD area-detector'
_diffrn_measurement_method       '\w scans, thick slices'
_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  0.0213
_diffrn_reflns_av_sigmaI/netI    0.0449
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            4670
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.85
_diffrn_reflns_theta_min         3.90
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.98
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrysAlisPro; Oxford Diffraction, 2009)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.215
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.149
_refine_diff_density_min         -0.158
_refine_ls_extinction_coef       0.014(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     214
_refine_ls_number_reflns         3411
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0803
_refine_ls_R_factor_gt           0.0538
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0635P)^2^+0.1599P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1213
_refine_ls_wR_factor_ref         0.1395
_reflns_number_gt                2453
_reflns_number_total             3411
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ku3113.cif
_cod_data_source_block           I
_cod_original_cell_volume        1674.95(14)
_cod_database_code               2019303