Simultaneous double 1,3-dipolar cycloaddition reactions involving bisnitrones or bisdipolarophiles. 1H NMR investigation of the conformational preferences of N-methyl- and N-phenyl-isoxazolidines
Heaney, Frances; Rooney, Oliver; Cunningham, Desmond; McArdle, Patrick; Journal of the Chemical Society, Perkin Transactions 2  (2001) 373–; doi:10.1039/b007164l

data_7216941
_publ_section_title
;
 Simultaneous double 1,3-dipolar cycloaddition reactions involving
 bisnitrones or bisdipolarophiles. 1H NMR investigation of the
 conformational preferences of N-methyl- and N-phenyl-isoxazolidines
;
_journal_issue                   3
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              373
_journal_paper_doi               10.1039/b007164l
_journal_year                    2001
_chemical_formula_sum            'C24 H28 N4 O7'
_chemical_formula_weight         484.50
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                71.62(3)
_cell_angle_beta                 74.82(4)
_cell_angle_gamma                85.00(3)
_cell_formula_units_Z            2
_cell_length_a                   10.628(5)
_cell_length_b                   11.108(3)
_cell_length_c                   11.442(5)
_cell_measurement_temperature    293(2)
_cell_volume                     1237.1(9)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.911
_diffrn_measured_fraction_theta_max 0.911
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0305
_diffrn_reflns_av_sigmaI/netI    0.0729
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            5872
_diffrn_reflns_theta_full        27.97
_diffrn_reflns_theta_max         27.97
_diffrn_reflns_theta_min         2.28
_exptl_absorpt_coefficient_mu    0.097
_exptl_crystal_density_diffrn    1.301
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             512
_refine_diff_density_max         0.393
_refine_diff_density_min         -0.385
_refine_diff_density_rms         0.088
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.957
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     321
_refine_ls_number_reflns         5418
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.957
_refine_ls_R_factor_all          0.1506
_refine_ls_R_factor_gt           0.0836
_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^)+(0.1602P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2190
_refine_ls_wR_factor_ref         0.2502
_reflns_number_gt                2569
_reflns_number_total             5418
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b007164l.txt
_cod_data_source_block           cb2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 
;
_cod_database_code               7216941