A complex with nitrogen single, double, and triple bonds to the same chromium atom: synthesis, structure, and reactivity
Beaumier, Evan P.; Billow, Brennan S.; Singh, Amrendra K.; Biros, Shannon M.; Odom, Aaron L.; Chem. Sci. 7 (2016) 2532–; doi:10.1039/C5SC04608D

data_1542273
_publ_section_title
;
 A complex with nitrogen single, double, and triple bonds to the same
 chromium atom: synthesis, structure, and reactivity
;
_journal_issue                   4
_journal_name_full               'Chem. Sci.'
_journal_page_first              2532
_journal_paper_doi               10.1039/C5SC04608D
_journal_volume                  7
_journal_year                    2016
_chemical_formula_moiety         'C20 H36 Cr N4 O'
_chemical_formula_sum            'C20 H36 Cr N4 O'
_chemical_formula_weight         400.53
_chemical_name_systematic
;
 ?
;
_chemical_properties_physical    'Air-sensitive, Moisture-sensitive'
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2015-09-29
_audit_creation_method
;
Olex2 1.2
(compiled 2015.01.26 svn.r3150 for OlexSys, GUI svn.r4998)
;
_audit_update_record
;
2015-09-30 deposited with the CCDC.
2016-01-05 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   16.6334(14)
_cell_length_b                   14.8352(12)
_cell_length_c                   18.1191(15)
_cell_measurement_reflns_used    9940
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.296
_cell_measurement_theta_min      2.248
_cell_volume                     4471.1(6)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_diffrn_ambient_temperature      173.15
_diffrn_detector_area_resol_mean 836.6
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0483
_diffrn_reflns_av_unetI/netI     0.0263
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            35220
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.389
_diffrn_reflns_theta_min         2.156
_diffrn_source                   'sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.527
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6690
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014/5) was used for absorption correction.
wR2(int) was 0.0671 before and 0.0577 after correction.
The Ratio of minimum to maximum transmission is 0.8977.
The \l/2 correction factor is 0.00150.
;
_exptl_crystal_colour            brown
_exptl_crystal_colour_primary    brown
_exptl_crystal_density_diffrn    1.190
_exptl_crystal_description       chunk
_exptl_crystal_F_000             1728
_exptl_crystal_size_max          0.586
_exptl_crystal_size_mid          0.266
_exptl_crystal_size_min          0.088
_refine_diff_density_max         0.433
_refine_diff_density_min         -0.286
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     244
_refine_ls_number_reflns         4098
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0533
_refine_ls_R_factor_gt           0.0405
_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^)+(0.0616P)^2^+2.5985P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1057
_refine_ls_wR_factor_ref         0.1168
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3272
_reflns_number_total             4098
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5sc04608d2.cif
_cod_data_source_block           acyl
_cod_depositor_comments
'Adding full bibliography for 1542271--1542274.cif.'
_cod_database_code               1542273
_shelxl_version_number           2013-3
_shelx_estimated_absorpt_t_max   0.955
_shelx_estimated_absorpt_t_min   0.748
_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
2.a Ternary CH refined with riding coordinates:
 C15(H15), C18(H18), C9(H9), C12(H12)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C6(H6)
2.c Idealised Me refined as rotating group:
 C17(H17A,H17B,H17C), C16(H16A,H16B,H16C), C20(H20A,H20B,H20C), C19(H19A,H19B,
 H19C), C8(H8A,H8B,H8C), C11(H11A,H11B,H11C), C10(H10A,H10B,H10C), C13(H13A,
 H13B,H13C), C14(H14A,H14B,H14C)
;
_shelx_res_checksum              51528
_olex2_diffrn_ambient_temperature_device 'Oxford Cryosystems'
_olex2_submission_special_instructions 'No special instructions were received'