Selectivity and Mechanism of Iridium-Catalyzed Cyclohexyl Methyl Ether Cleavage
Fast, Caleb D.; Jones, Caleb A. H.; Schley, Nathan D.; ACS Catalysis  (2020) 6450–6456; doi:10.1021/acscatal.0c01718

data_4517695
_publ_section_title
;
 Selectivity and Mechanism of Iridium-Catalyzed Cyclohexyl Methyl Ether
 Cleavage
;
_journal_name_full               'ACS Catalysis'
_journal_page_first              6450
_journal_page_last               6456
_journal_paper_doi               10.1021/acscatal.0c01718
_journal_year                    2020
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C42 H64 O3 Si'
_chemical_formula_sum            'C42 H64 O3 Si'
_chemical_formula_weight         645.02
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-08-16
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 107.5320(12)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   12.55791(14)
_cell_length_b                   11.21470(10)
_cell_length_c                   14.01011(16)
_cell_measurement_reflns_used    10039
_cell_measurement_temperature    100.01(10)
_cell_measurement_theta_max      73.2440
_cell_measurement_theta_min      3.2850
_cell_volume                     1881.44(4)
_computing_cell_refinement       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.46 (Rigaku OD, 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_environment      N~2~
_diffrn_ambient_temperature      100.01(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.1506
_diffrn_detector_type            EosS2
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
--------------------------------------------------------------------------
  1  \w    -56.00  32.00   1.00    3.00    --  -37.09  38.00  60.00   88
  2  \w    -54.00  30.00   1.00    3.00    --  -37.09  57.00 120.00   84
  3  \w    -54.00  30.00   1.00    3.00    --  -37.09  57.00 150.00   84
  4  \w   -104.00 -20.00   1.00    3.00    --  -37.09 -57.00 150.00   84
  5  \w    -64.00  30.00   1.00    3.00    --  -37.09  77.00-180.00   94
  6  \w   -104.00 -20.00   1.00    3.00    --  -37.09 -57.00  60.00   84
  7  \w     20.00 104.00   1.00    3.00    --   37.09  57.00  90.00   84
  8  \w      8.00 108.00   1.00    3.00    --   37.09  19.00-150.00  100
  9  \w      4.00  33.00   1.00    3.00    --   37.09  88.00 162.77   29
 10  \w     10.00 105.00   1.00    3.00    --   37.09  77.00  90.00   95
 11  \w      4.00  33.00   1.00    3.00    --   37.09  88.00  25.98   29
 12  \w      3.00  32.00   1.00    3.00    --   37.09  90.00-109.70   29
 13  \w     20.00 104.00   1.00    3.00    --   37.09  57.00  60.00   84
 14  \w    -32.00  56.00   1.00    3.00    --   37.09 -38.00  30.00   88
 15  \w     42.00 145.00   1.00   16.00    --  111.00 -90.00 137.00  103
 16  \w     43.00 128.00   1.00   16.00    --  111.00 -45.00  90.00   85
 17  \w     41.00 132.00   1.00   16.00    --  111.00 -30.00-120.00   91
 18  \w     43.00 128.00   1.00   16.00    --  111.00 -45.00 120.00   85
 19  \w     42.00 144.00   1.00   16.00    --  111.00 -88.00 -58.30  102
 20  \w     42.00 178.00   1.00   16.00    --  111.00   0.00  30.00  136
 21  \w     43.00 128.00   1.00   16.00    --  111.00 -45.00   0.00   85
 22  \w     41.00 132.00   1.00   16.00    --  111.00 -30.00 -30.00   91
 23  \w     41.00 132.00   1.00   16.00    --  111.00 -30.00-180.00   91
 24  \w     42.00 145.00   1.00   16.00    --  111.00 -90.00  28.49  103
 25  \w     93.00 178.00   1.00   16.00    --  111.00  61.00  60.00   85
 26  \w     42.00 130.00   1.00   16.00    --  111.00 -90.00-122.69   88
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      0.0860903000
_diffrn_orient_matrix_UB_12      -0.0294364000
_diffrn_orient_matrix_UB_13      0.1015204000
_diffrn_orient_matrix_UB_21      0.0088518000
_diffrn_orient_matrix_UB_22      0.1334301000
_diffrn_orient_matrix_UB_23      0.0274813000
_diffrn_orient_matrix_UB_31      -0.0951611000
_diffrn_orient_matrix_UB_32      -0.0142160000
_diffrn_orient_matrix_UB_33      0.0473678000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0366
_diffrn_reflns_av_unetI/netI     0.0425
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            19098
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.976
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         73.383
_diffrn_reflns_theta_min         3.308
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.818
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.932
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.46 (Rigaku Oxford Diffraction, 2015)
Numerical absorption correction based on gaussian integration over
			a multifaceted crystal model
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.139
_exptl_crystal_description       block
_exptl_crystal_F_000             708
_exptl_crystal_size_max          0.114
_exptl_crystal_size_mid          0.058
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.211
_refine_diff_density_min         -0.182
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details
;
 Flack x determined using 3058 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.005(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     423
_refine_ls_number_reflns         7374
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0353
_refine_ls_R_factor_gt           0.0322
_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^)+(0.0321P)^2^+0.2159P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0754
_refine_ls_wR_factor_ref         0.0770
_reflns_Friedel_coverage         0.871
_reflns_Friedel_fraction_full    0.994
_reflns_Friedel_fraction_max     0.961
_reflns_number_gt                6948
_reflns_number_total             7374
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cs0c01718_si_002.cif
_cod_data_source_block           16
_cod_depositor_comments
'Adding full bibliography for 4517689--4517702.cif.'
_cod_database_code               4517695
_shelx_shelxl_version_number     2018/1
_chemical_oxdiff_formula         C42H64O3Si
_reflns_odcompleteness_completeness 99.92
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     68.13
_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.a Ternary CH refined with riding coordinates:
 C3(H3), C5(H5), C8(H8), C9(H9), C12(H12), C14(H14), C17(H17), C20(H20)
2.b Secondary CH2 refined with riding coordinates:
 C1(H1B,H1A), C2(H2A,H2B), C4(H4A,H4B), C6(H6A,H6B), C7(H7A,H7B), C11(H11A,
 H11B), C15(H15A,H15B), C16(H16A,H16B), C22(H22A,H22B), C23(H23A,H23B),
 C24(H24A,H24B)
2.c Aromatic/amide H refined with riding coordinates:
 C32(H32), C33(H33), C34(H34), C35(H35), C36(H36), C38(H38), C39(H39),
 C40(H40), C41(H41), C42(H42)
2.d Idealised Me refined as rotating group:
 C18(H18A,H18B,H18C), C19(H19A,H19B,H19C), C21(H21A,H21B,H21C), C25(H25A,H25B,
 H25C), C26(H26A,H26B,H26C), C28(H28A,H28B,H28C), C29(H29A,H29B,H29C), C30(H30A,
 H30B,H30C)
;
_shelx_res_checksum              28749
_shelx_hkl_checksum              32924
_olex2_date_sample_data_collection 2019-08-15
_olex2_exptl_crystal_mounting_method 'mounted in a polyimide loop'
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.307
_oxdiff_exptl_absorpt_empirical_full_min 0.858