Expedient Access to Unsymmetrical Triarylmethanes through N-Heterocyclic Carbene Catalysed 1,6-Conjugate Addition of 2-Naphthols to para-Quinone Methides
Arde, Panjab; Ramasamy, Vijaya Anand; RSC Adv.  (2016) –; doi:10.1039/C6RA11116E

data_7226201
_publ_section_title
;
 Expedient Access to Unsymmetrical Triarylmethanes through N-Heterocyclic
 Carbene Catalysed 1,6-Conjugate Addition of 2-Naphthols to para-Quinone
 Methides
;
_journal_name_full               'RSC Adv.'
_journal_paper_doi               10.1039/C6RA11116E
_journal_year                    2016
_chemical_formula_moiety         'C32 H36 O3'
_chemical_formula_sum            'C32 H36 O3'
_chemical_formula_weight         468.61
_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
_audit_creation_date             2016-02-07
_audit_creation_method
;
Olex2 1.2
(compiled 2015.09.30 svn.r3233 for OlexSys, GUI svn.r5103)
;
_audit_update_record
;
2016-02-11 deposited with the CCDC.
2016-08-01 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.9865(10)
_cell_length_b                   11.6624(10)
_cell_length_c                   20.9000(17)
_cell_measurement_temperature    566(2)
_cell_volume                     2677.9(4)
_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      566.3
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.2643
_diffrn_reflns_av_unetI/netI     0.1361
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            29152
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.477
_diffrn_reflns_theta_min         3.208
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.073
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.162
_exptl_crystal_density_method    "'not measured'"
_exptl_crystal_description       Prism
_exptl_crystal_F_000             1008
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.220
_refine_diff_density_min         -0.155
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details
;
 Flack x determined using 1085 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -2.5(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.957
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     325
_refine_ls_number_reflns         6127
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.957
_refine_ls_R_factor_all          0.1081
_refine_ls_R_factor_gt           0.0738
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.2000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2027
_refine_ls_wR_factor_ref         0.2382
_reflns_Friedel_coverage         0.779
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                3904
_reflns_number_total             6127
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ra11116e2.cif
_cod_data_source_block           dddd_a
_cod_database_code               7226201
_shelx_estimated_absorpt_t_max   0.986
_shelx_estimated_absorpt_t_min   0.986
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(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:
 C8(H8)
2.b Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C6(H6), C7(H7), C11(H11), C12(H12), C15(H15), C16(H16),
 C17(H17), C18(H18), C20(H20), C24(H24)
2.c Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C26(H26A,H26B,H26C), C27(H27A,H27B,H27C), C28(H28A,H28B,
 H28C), C30(H30A,H30B,H30C), C31(H31A,H31B,H31C), C32(H32A,H32B,H32C)
2.d Idealised tetrahedral OH refined as rotating group:
 O2(H2), O3(H3A)
;
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'