Late-Stage Diversification by Selectivity Switch in meta-C–H Activation: Evidence for Singlet Stabilization
Korvorapun, Korkit; Kuniyil, Rositha; Ackermann, Lutz; ACS Catalysis  (2019) 435–; doi:10.1021/acscatal.9b04592

data_4517181
_publ_section_title
;
 Late-Stage Diversification by Selectivity Switch in meta-C--H Activation:
 Evidence for Singlet Stabilization
;
_journal_name_full               'ACS Catalysis'
_journal_page_first              435
_journal_paper_doi               10.1021/acscatal.9b04592
_journal_year                    2019
_chemical_formula_moiety         'C18 H16 N2'
_chemical_formula_sum            'C18 H16 N2'
_chemical_formula_weight         260.33
_space_group_crystal_system      orthorhombic
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-08-15
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.2928(3)
_cell_length_b                   6.01020(10)
_cell_length_c                   36.9034(9)
_cell_measurement_reflns_used    5752
_cell_measurement_temperature    99.97
_cell_measurement_theta_max      29.55
_cell_measurement_theta_min      2.76
_cell_volume                     2726.50(10)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_reduction        'SAINT V8.38A (?, 2016)'
_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    'XT (Sheldrick, 2015)'
_diffrn_ambient_temperature      99.97
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0264
_diffrn_reflns_av_unetI/netI     0.0245
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       51
_diffrn_reflns_limit_l_min       -51
_diffrn_reflns_number            28332
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.571
_diffrn_reflns_theta_min         3.312
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.8879
_exptl_absorpt_correction_T_min  0.8462
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.0686 before and 0.0514 after correction. The Ratio of minimum to maximum transmission is 0.9448. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.268
_exptl_crystal_description       block
_exptl_crystal_F_000             1104
_exptl_crystal_recrystallization_method
'The material was recrystallised from a mixture of DCM and hexane  by solvent layering'
_exptl_crystal_size_max          0.309
_exptl_crystal_size_mid          0.268
_exptl_crystal_size_min          0.244
_refine_diff_density_max         0.523
_refine_diff_density_min         -0.253
_refine_diff_density_rms         0.042
_refine_ls_abs_structure_details
;
 Flack x determined using 3410 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.2(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     452
_refine_ls_number_reflns         7604
_refine_ls_number_restraints     151
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0443
_refine_ls_R_factor_gt           0.0431
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0600P)^2^+0.9708P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1153
_refine_ls_wR_factor_ref         0.1162
_reflns_Friedel_coverage         0.965
_reflns_Friedel_fraction_full    0.992
_reflns_Friedel_fraction_max     0.993
_reflns_number_gt                7359
_reflns_number_total             7604
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cs9b04592_si_003.cif
_cod_data_source_block           pca21
_cod_database_code               4517181
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_max   0.982
_shelx_estimated_absorpt_t_min   0.977
_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
2. Rigid body (RIGU) restrains
 C26B, C27B, C28B, C29B, C30B, C31B, C32B, C33B, C34B, C35B, C36B
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
 C26A, C27A, C28A, C29A, C30A, C31A, C32A, C33A, C34A, C35A, C36A
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
3. Others
 Sof(H25A)=Sof(C26B)=Sof(H26B)=Sof(C27B)=Sof(C28B)=Sof(H28B)=Sof(C29B)=
 Sof(H29B)=Sof(C30B)=Sof(C31B)=Sof(H31B)=Sof(C32B)=Sof(H32B)=Sof(C33B)=
 Sof(H33B)=Sof(C34B)=Sof(H34B)=Sof(C35B)=Sof(H35B)=Sof(C36B)=Sof(H36D)=
 Sof(H36E)=Sof(H36F)=1-FVAR(1)
 Sof(H25)=Sof(C26A)=Sof(H26A)=Sof(C27A)=Sof(C28A)=Sof(H28A)=Sof(C29A)=
 Sof(H29A)=Sof(C30A)=Sof(C31A)=Sof(H31A)=Sof(C32A)=Sof(H32A)=Sof(C33A)=
 Sof(H33A)=Sof(C34A)=Sof(H34A)=Sof(C35A)=Sof(H35A)=Sof(C36A)=Sof(H36A)=
 Sof(H36B)=Sof(H36C)=FVAR(1)
4.a Ternary CH refined with riding coordinates:
 C11(H11), C29A(H29A), C29B(H29B)
4.b Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C6(H6), C8(H8), C9(H9), C10(H10), C13(H13), C14(H14),
 C15(H15), C16(H16), C17(H17), C19(H19), C20(H20), C21(H21), C24(H24), C25(H25),
  C25(H25A), C26A(H26A), C26B(H26B), C28A(H28A), C28B(H28B), C31B(H31B),
 C32B(H32B), C33B(H33B), C34B(H34B), C35B(H35B), C31A(H31A), C32A(H32A),
 C33A(H33A), C34A(H34A), C35A(H35A)
4.c Fitted hexagon refined as free rotating group:
 C30B(C31B,C32B,C33B,C34B,C35B)
4.d Idealised Me refined as rotating group:
 C18(H18A,H18B,H18C), C36A(H36A,H36B,H36C), C36B(H36D,H36E,H36F)
;
_shelx_res_checksum              50288
_shelx_hkl_checksum              20565
_olex2_diffrn_ambient_temperature_device 'Oxford Cryosystems Cryostream 800'
_olex2_exptl_crystal_mounting_method
'The crystal was mounted on a MITIGEN holder in perfluoroether oil'
_olex2_submission_special_instructions 'No special instructions were received'