Carbodiimide insertion reactions of homoleptic heavier alkaline earth amides and phosphides.
Barrett, Anthony G. M.; Crimmin, Mark R.; Hill, Michael S.; Hitchcock, Peter B.; Lomas, Sarah L.; Mahon, Mary F.; Procopiou, Panayiotis A.; Dalton transactions (Cambridge, England : 2003) 39 (2010) 7393–7400; doi:10.1039/c0dt00089b

data_7025977
_publ_section_title
;
 Carbodiimide insertion reactions of homoleptic heavier alkaline earth
 amides and phosphides.
;
_journal_issue                   31
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7393
_journal_page_last               7400
_journal_paper_doi               10.1039/c0dt00089b
_journal_volume                  39
_journal_year                    2010
_chemical_formula_sum            'C46 H64 N6 O2 Sr'
_chemical_formula_weight         820.65
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 92.401(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.2465(3)
_cell_length_b                   17.1561(5)
_cell_length_c                   25.8067(5)
_cell_measurement_reflns_used    51101
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.022
_cell_measurement_theta_min      3.395
_cell_volume                     4532.6(2)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.974
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0723
_diffrn_reflns_av_sigmaI/netI    0.0592
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            35150
_diffrn_reflns_theta_full        26.17
_diffrn_reflns_theta_max         26.17
_diffrn_reflns_theta_min         3.52
_diffrn_source                   'Enraf Nonius FR590'
_exptl_absorpt_coefficient_mu    1.231
_exptl_absorpt_correction_T_max  0.925
_exptl_absorpt_correction_T_min  0.7831
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
[c.f. r.h. blessing, acta cryst. (1995), a51, 33-38]
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.203
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1744
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.277
_refine_diff_density_min         -0.461
_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     551
_refine_ls_number_reflns         8844
_refine_ls_number_restraints     84
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0732
_refine_ls_R_factor_gt           0.0438
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0306P)^2^+3.0594P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0864
_refine_ls_wR_factor_ref         0.0977
_reflns_number_gt                6576
_reflns_number_total             8844
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00089b.txt
_cod_data_source_block           768277
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7025977