Novel (n + 1 + 1) cycloaddition reactions; the formation of cyclic tetraphosphonium dications with four linked phosphorus atoms and an organic backbone.
Boyall, Alice J.; Dillon, Keith B.; Howard, Judith A. K.; Monks, Philippa K.; Thompson, Amber L.; Dalton transactions (Cambridge, England : 2003)  (2007) 1374–1376; doi:10.1039/b618157k

data_7005215
_publ_section_title
;
 Novel (n + 1 + 1) cycloaddition reactions; the formation of cyclic
 tetraphosphonium dications with four linked phosphorus atoms and an
 organic backbone.
;
_journal_issue                   14
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1374
_journal_page_last               1376
_journal_paper_doi               10.1039/b618157k
_journal_year                    2007
_chemical_formula_moiety         'C29 H32 P4, 2(C H Cl3), Cl6 Sn'
_chemical_formula_sum            'C31 H34 Cl12 P4 Sn'
_chemical_formula_weight         1074.55
_chemical_melting_point          ?
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 93.190(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.1214(12)
_cell_length_b                   18.8045(19)
_cell_length_c                   19.074(2)
_cell_measurement_reflns_used    5025
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.472
_cell_measurement_theta_min      2.225
_cell_volume                     4340.9(8)
_computing_cell_refinement       'SMART-NT V6.1 (Bruker, 2000)'
_computing_data_collection       'SMART-NT V6.1 (Bruker, 2000)'
_computing_data_reduction        'SAINT-NT V6.45A (Bruker, 2000)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker SMART CCD 1K area detector'
_diffrn_measurement_method       \w-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  0.0920
_diffrn_reflns_av_sigmaI/netI    0.0725
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            41366
_diffrn_reflns_theta_full        27.53
_diffrn_reflns_theta_max         27.53
_diffrn_reflns_theta_min         1.52
_exptl_absorpt_coefficient_mu    1.499
_exptl_absorpt_correction_T_max  0.9415
_exptl_absorpt_correction_T_min  0.7562
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'XPREP (SHELXTL,1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.644
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       block
_exptl_crystal_F_000             2136
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.995
_refine_diff_density_min         -1.021
_refine_diff_density_rms         0.124
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.103
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     435
_refine_ls_number_reflns         9968
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.103
_refine_ls_R_factor_all          0.0963
_refine_ls_R_factor_gt           0.0596
_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^)+(0.0130P)^2^+13.7661P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0859
_refine_ls_wR_factor_ref         0.0945
_reflns_number_gt                7181
_reflns_number_total             9968
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b618157k.txt
_cod_data_source_block           3a
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_cell_volume        4341.0(8)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7005215