Ring Contraction of a Pinacolatoboryl Group To Form a 1,2-Oxaboretane Ring: Reaction of Unsymmetrical Diborane(4) with 2,6-Dimethylphenyl Isocyanide
Katsuma, Yuhei; Asakawa, Hiroki; Lee, Ka-Ho; Lin, Zhenyang; Yamashita, Makoto; Organometallics 35 (2016) 2563–; doi:10.1021/acs.organomet.6b00468

data_4086688
_publ_section_title
;
 Ring Contraction of a Pinacolatoboryl Group To Form a 1,2-Oxaboretane
 Ring: Reaction of Unsymmetrical Diborane(4) with 2,6-Dimethylphenyl
 Isocyanide
;
_journal_issue                   15
_journal_name_full               Organometallics
_journal_page_first              2563
_journal_paper_doi               10.1021/acs.organomet.6b00468
_journal_volume                  35
_journal_year                    2016
_chemical_formula_moiety         'C42 H52 B2 N2 O2'
_chemical_formula_sum            'C42 H52 B2 N2 O2'
_chemical_formula_weight         638.47
_chemical_name_systematic
;
 ?
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014
_cell_angle_alpha                90
_cell_angle_beta                 95.620(6)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   14.737(5)
_cell_length_b                   15.930(5)
_cell_length_c                   33.154(12)
_cell_measurement_reflns_used    10058
_cell_measurement_temperature    93
_cell_measurement_theta_max      31.2
_cell_measurement_theta_min      1.9
_cell_volume                     7746(5)
_computing_cell_refinement       'RIGAKU CrystalClear'
_computing_data_collection       'RIGAKU CrystalClear'
_computing_data_reduction        'RIGAKU CrystalClear'
_computing_molecular_graphics    'Yadokari-XG 2009(Wakita Nemoto et al.)'
_computing_publication_material  'Yadokari-XG 2009(Wakita,Nemoto et al.)'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_solution    SIR-97
_diffrn_ambient_temperature      93(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku VariMax Saturn'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_source         'rotating-anode X-ray tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0648
_diffrn_reflns_av_unetI/netI     0.0533
_diffrn_reflns_Laue_measured_fraction_full 0.976
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            25750
_diffrn_reflns_point_group_measured_fraction_full 0.976
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.000
_diffrn_reflns_theta_min         1.943
_exptl_absorpt_coefficient_mu    0.065
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.802
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            Orange
_exptl_crystal_density_diffrn    1.095
_exptl_crystal_description       Prism
_exptl_crystal_F_000             2752
_exptl_crystal_size_max          0.250
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.150
_refine_diff_density_max         0.556
_refine_diff_density_min         -0.362
_refine_diff_density_rms         0.108
_refine_ls_extinction_coef       0.0044(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.082
_refine_ls_hydrogen_treatment    refU
_refine_ls_matrix_type           full
_refine_ls_number_parameters     500
_refine_ls_number_reflns         6804
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.082
_refine_ls_R_factor_all          0.0930
_refine_ls_R_factor_gt           0.0726
_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^)+(0.1031P)^2^+4.5338P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1809
_refine_ls_wR_factor_ref         0.2000
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5268
_reflns_number_total             6804
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            om6b00468_si_002.cif
_cod_data_source_block           7
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_database_code               4086688
_shelx_estimated_absorpt_t_min   0.984
_shelx_estimated_absorpt_t_max   0.990
_shelxl_version_number           2014-3
_shelx_res_checksum              8836
_shelx_hkl_checksum              55217