Sm(II) reduction chemistry of heteroalkynes: stable adducts, reductive coupling, reductive C-C/C-N bond cleavage and trapping of the tert-butyl fragment with bulky nitriles, phosphaalkynes and isonitriles.
Gardiner, Michael G.; James, Adam N.; Jones, Cameron; Schulten, Christian; Dalton transactions (Cambridge, England : 2003) 39 (2010) 6864–6870; doi:10.1039/c002778b

data_7025681
_publ_section_title
;
 Sm(II) reduction chemistry of heteroalkynes: stable adducts, reductive
 coupling, reductive C-C/C-N bond cleavage and trapping of the tert-butyl
 fragment with bulky nitriles, phosphaalkynes and isonitriles.
;
_journal_issue                   29
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6864
_journal_page_last               6870
_journal_paper_doi               10.1039/c002778b
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         '(C47 H72 N5 Sm)'
_chemical_formula_sum            'C47 H72 N5 Sm'
_chemical_formula_weight         857.45
_chemical_name_systematic
;
?
;
_space_group_IT_number           63
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      63
_symmetry_space_group_name_Hall  '-C 2c 2'
_symmetry_space_group_name_H-M   'C m c m'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.06(6)
_cell_length_b                   10.493(7)
_cell_length_c                   19.3928(15)
_cell_measurement_reflns_used    23
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      10.20
_cell_measurement_theta_min      7.42
_cell_volume                     4285(13)
_computing_cell_refinement       'CAD4 Express (Enraf-Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf-Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics
;
X-SEED (Barbour, 2001) and ORTEPIII (Farrugia, 1997)
;
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'Enraf Nonius TurboCAD4'
_diffrn_measurement_method       'non-profiled omega/2theta scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0772
_diffrn_reflns_av_sigmaI/netI    0.0267
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            1986
_diffrn_reflns_theta_full        25.04
_diffrn_reflns_theta_max         25.04
_diffrn_reflns_theta_min         1.93
_diffrn_standards_decay_%        3
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    1.408
_exptl_absorpt_correction_T_max  0.6307
_exptl_absorpt_correction_T_min  0.5903
_exptl_absorpt_correction_type   analytical
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.329
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1804
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         3.143
_refine_diff_density_min         -2.250
_refine_diff_density_rms         0.256
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.076
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     132
_refine_ls_number_reflns         1971
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.076
_refine_ls_R_factor_all          0.0901
_refine_ls_R_factor_gt           0.0832
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1340P)^2^+120.1107P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2106
_refine_ls_wR_factor_ref         0.2174
_reflns_number_gt                1814
_reflns_number_total             1971
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c002778b.txt
_cod_data_source_block           c:smtbutbu
_cod_original_cell_volume        4286(13)
_cod_original_sg_symbol_H-M      Cmcm
_cod_database_code               7025681