A Unified Approach to the Isomeric α-, β-, γ-, and δ-Carbolines via their 6,7,8,9-Tetrahydro Counterparts.
Yan, Qiao; Gin, Emma; Banwell, Martin G.; Willis, Anthony C.; Carr, Paul D.; The Journal of organic chemistry 82 (2017) 4328–4335; doi:10.1021/acs.joc.7b00323

data_4032458
_publ_section_title
;
 A Unified Approach to the Isomeric \a-, \b-, \g-, and \d-Carbolines via
 their 6,7,8,9-Tetrahydro Counterparts.
;
_journal_issue                   8
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              4328
_journal_page_last               4335
_journal_paper_doi               10.1021/acs.joc.7b00323
_journal_volume                  82
_journal_year                    2017
_chemical_absolute_configuration unk
_chemical_compound_source        local
_chemical_formula_moiety         'C11 H8 N2'
_chemical_formula_sum            'C11 H8 N2'
_chemical_formula_weight         168.20
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'I -2ya'
_symmetry_space_group_name_H-M   'I 1 a 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_audit_creation_date             16-07-15
_audit_creation_method           CRYSTALS_ver_14.40
_audit_update_record
;
2016-07-18 - Report on C11 H8 N2 
             by Anthony C. Willis
             for   Qiao Yan and Martin Banwell

2016-07-18 - details of refinement in _refine_special_details below

2016-07-18- passes checkcif tests with minor warnings  
;
_cell_angle_alpha                90
_cell_angle_beta                 107.250(7)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.1155(7)
_cell_length_b                   3.9036(2)
_cell_length_c                   18.1199(13)
_cell_measurement_reflns_used    2985
_cell_measurement_temperature    150
_cell_measurement_theta_max      73
_cell_measurement_theta_min      5
_cell_volume                     818.42(9)
_computing_cell_refinement       'CrysAlisPro 1.171.38.43 (Rigaku OD, 2016)'
_computing_data_collection       'CrysAlisPro 1.171.38.43 (Rigaku OD, 2016)'
_computing_data_reduction        'CrysAlisPro 1.171.38.43 (Rigaku OD, 2016)'
_computing_molecular_graphics    'PLATON (Spek, 2008)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150
_diffrn_detector                 'CCD plate'
_diffrn_detector_type            EosS2
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.035
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -3
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            5934
_diffrn_reflns_theta_full        73.246
_diffrn_reflns_theta_max         73.246
_diffrn_reflns_theta_min         5.112
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.655
_exptl_absorpt_correction_T_max  0.98
_exptl_absorpt_correction_T_min  0.86
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro version 1.171.38.43 (Rigaku Oxford Diffraction, 2016)
(Release 29 April 2016; compiled 27 May 2016,16:53)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.365
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.225
_exptl_crystal_size_mid          0.058
_exptl_crystal_size_min          0.032
_refine_diff_density_max         0.17
_refine_diff_density_min         -0.14
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0464
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     119
_refine_ls_number_reflns         818
_refine_ls_number_restraints     2
_refine_ls_R_factor_all          0.0422
_refine_ls_R_factor_gt           0.0420
_refine_ls_shift/su_max          0.0002349
_refine_ls_shift/su_mean         0.0000721
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.02P)^2^ + 1.79P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1070
_refine_ls_wR_factor_gt          0.1070
_refine_ls_wR_factor_ref         0.1070
_reflns_limit_h_max              14
_reflns_limit_h_min              -14
_reflns_limit_k_max              4
_reflns_limit_k_min              0
_reflns_limit_l_max              22
_reflns_limit_l_min              0
_reflns_number_gt                807
_reflns_number_total             820
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.26
_oxford_diffrn_Wilson_scale      0.01
_oxford_refine_ls_r_factor_ref   0.0422
_oxford_refine_ls_scale          9.8(10)
_oxford_reflns_number_all        818
_oxford_reflns_threshold_expression_ref I>-10.0\s(I)
_oxford_structure_analysis_title 'Z:\ban1635SN\Results_twin\twin5_ At 16:15 on'
_cod_data_source_file            jo7b00323_si_004.cif
_cod_data_source_block           ban1635SN
_cod_original_sg_symbol_Hall     'I -2ya '
_cod_original_sg_symbol_H-M      'I a '
_cod_database_code               4032458
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_iucr_refine_instruction_details_constraints
;
BLOCK SCALE X'S, U'S 
SUMFIX ELEMENT SCALES 
RIDE N   (   1,X'S) H   (   1,X'S) 
RIDE C   (   2,X'S) H   (  21,X'S) 
RIDE C   (   3,X'S) H   (  31,X'S) 
RIDE C   (   4,X'S) H   (  41,X'S) 
RIDE C   (   7,X'S) H   (  71,X'S) 
RIDE C   (   8,X'S) H   (  81,X'S) 
RIDE C   (   9,X'S) H   (  91,X'S) 
RIDE C   (  10,X'S) H   ( 101,X'S) 
END                                                                             
;
_iucr_refine_instruction_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
;