A synthesis of oligomeric alpha-hydroxy phenylphosphinates and a study of the conformational preferences of the dimers.
Afarinkia, Kamyar; Royappa, Martin; Scowen, Ian J.; Steed, Jonathan W.; Yu, Hiu-Wan; Organic & biomolecular chemistry 8 (2010) 600–606; doi:10.1039/b917737j

data_7153252
_publ_section_title
;
 A synthesis of oligomeric alpha-hydroxy phenylphosphinates and a study of
 the conformational preferences of the dimers.
;
_journal_issue                   3
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              600
_journal_page_last               606
_journal_paper_doi               10.1039/b917737j
_journal_volume                  8
_journal_year                    2010
_chemical_formula_sum            'C23 H34 O5 P2'
_chemical_formula_weight         452.44
_chemical_name_common            '04srv178 - HY/5/35-Fr50-r'
_space_group_IT_number           148
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_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                120.00
_cell_formula_units_Z            18
_cell_length_a                   20.3573(4)
_cell_length_b                   20.3573(4)
_cell_length_c                   31.9361(12)
_cell_measurement_temperature    120(2)
_cell_volume                     11461.8(5)
_computing_cell_refinement       'SMART V5.625 (Bruker, 2001)'
_computing_data_collection       'SMART V5.625 (Bruker, 2001)'
_computing_data_reduction        'SAINT+ NT V6.22 (Bruker, 2001)'
_computing_molecular_graphics    'XSeed interface to POVRay'
_computing_publication_material  'CIFTAB (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_method       \w
_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  0.0444
_diffrn_reflns_av_sigmaI/netI    0.0276
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       41
_diffrn_reflns_limit_l_min       -41
_diffrn_reflns_number            40132
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.72
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.199
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.180
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             4356
_refine_diff_density_max         0.340
_refine_diff_density_min         -0.317
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     326
_refine_ls_number_reflns         5866
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0637
_refine_ls_R_factor_gt           0.0455
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0406P)^2^+16.7743P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1010
_refine_ls_wR_factor_ref         0.1088
_reflns_number_gt                4616
_reflns_number_total             5866
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b917737j.txt
_cod_data_source_block           C:\Documents
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_cod_database_code               7153252