Pre-inverse-crowns: synthetic, structural and reactivity studies of alkali metal magnesiates primed for inverse crown formation
Martínez-Martínez, A. J.; Armstrong, D. R.; Conway, B.; Fleming, B. J.; Klett, J.; Kennedy, A. R.; Mulvey, R. E.; Robertson, S. D.; O'Hara, C. T.; Chemical Science 5 (2014) 771–; doi:10.1039/c3sc52816b

data_1513615
_publ_section_title
;
 Pre-inverse-crowns: synthetic, structural and reactivity studies of
 alkali metal magnesiates primed for inverse crown formation
;
_journal_issue                   2
_journal_name_full               'Chemical Science'
_journal_page_first              771
_journal_paper_doi               10.1039/c3sc52816b
_journal_volume                  5
_journal_year                    2014
_chemical_formula_sum            'C22 H45 K Mg N2'
_chemical_formula_weight         401.01
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 105.997(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            6
_cell_length_a                   12.8807(5)
_cell_length_b                   26.5173(9)
_cell_length_c                   16.1073(6)
_cell_measurement_reflns_used    7810
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      55.6698
_cell_measurement_theta_min      3.3025
_cell_volume                     5288.6(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Oxford Diffraction Gemini S'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.0499
_diffrn_reflns_av_sigmaI/netI    0.1081
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            20246
_diffrn_reflns_theta_full        55.74
_diffrn_reflns_theta_max         55.74
_diffrn_reflns_theta_min         6.36
_exptl_absorpt_coefficient_mu    1.516
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.84562
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.34.46 (release 25-11-2010 CrysAlis171 .NET)
(compiled Nov 25 2010,17:55:46)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    0.755
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1332
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.244
_refine_diff_density_min         -0.157
_refine_diff_density_rms         0.032
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.151(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.805
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     731
_refine_ls_number_reflns         11462
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.805
_refine_ls_R_factor_all          0.0729
_refine_ls_R_factor_gt           0.0468
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0457P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0923
_refine_ls_wR_factor_ref         0.0975
_reflns_number_gt                7019
_reflns_number_total             11462
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            c3sc52816b.txt
_cod_data_source_block           jkben9
_cod_original_cell_volume        5288.6(3)
_cod_original_sg_symbol_H-M      P21
_cod_database_code               1513615