data_2005053 _journal_name_full 'Acta Crystallographica' _journal_year 1996 _journal_volume 'C52' _journal_page_first 1471 _journal_page_last 1473 _publ_section_title ; Piperazinium L-Tartrate ; _chemical_formula_moiety 'C4 H12 N2 , C4 H4 O6' _chemical_formula_sum 'C8 H16 N2 O6' _chemical_formula_weight 236.23 _symmetry_cell_setting 'monoclinic' loop_ _symmetry_equiv_pos_as_xyz 'x,y,z' '-x,y+1/2,-z' _symmetry_space_group_name_H-M 'P 21' _cell_length_a 6.4262(10) _cell_length_b 9.1322(10) _cell_length_c 9.3627(10) _cell_angle_alpha 90 _cell_angle_beta 108.850(10) _cell_angle_gamma 90 _cell_volume 519.98(11) _cell_formula_units_Z 2 _exptl_crystal_density_diffrn 1.509 _cell_measurement_temperature 293(2) loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv C(1) -0.5779(3) .4773(2) -0.6549(2) .0290(10) C(2) -0.5047(3) .5182(2) -0.7866(2) .0290(10) N(3) -0.3463(2) .40810(10) -0.80540(10) .0240(10) C(4) -0.4425(3) .2579(2) -0.8263(2) .0260(10) C(5) -0.5191(3) .2163(2) -0.6958(2) .0290(10) N(6) -0.6749(2) .3277(2) -0.67480(10) .0280(10) C(1') .1048(2) .3610(2) -0.4015(2) .0270(10) O(11') -.0590(2) .3588(2) -0.51620(10) .0500(10) O(12') .2969(2) .3290(2) -0.39460(10) .0380(10) C(2') .0716(2) .4078(2) -0.2529(2) .0240(10) O(21') .2753(2) .42540(10) -0.13770(10) .0310(10) C(3') -.0698(2) .2957(2) -0.2043(2) .0220(10) O(31') .0288(2) .15560(10) -0.18690(10) .0300(10) C(4') -0.1082(2) .3450(2) -.05790(10) .0220(10) O(41') -0.2368(2) .45010(10) -.06650(10) .0310(10) O(42') -.0096(2) .27440(10) .05890(10) .0310(10) H(1A) -0.6757 .5486 -0.6383 .0350(10) H(1B) -0.4381 .4765 -0.5618 .0350(10) H(2B) -0.6344 .5286 -0.8788 .0340(10) H(2A) -0.4317 .6135 -0.7826 .0340(10) H(3B) -0.2286 .4135 -0.7206 .0290(10) H(3A) -0.3108 .4349 -0.9018 .0290(10) H(4B) -0.5806 .2578 -0.9184 .0320(10) H(4A) -0.3297 .1827 -0.8419 .0320(10) H(5B) -0.3884 .2088 -0.6027 .0340(10) H(5A) -0.5932 .1233 -0.7190 .0340(10) H(6B) -0.8010 .3295 -0.7600 .0340(10) H(6A) -0.7118 .3106 -0.5993 .0340(10) H(2') -0.0095 .5092 -0.2791 .0290(10) H(21') .3846 .4043 -0.1585 .0370(10) H(3') -0.2221 .2858 -0.2799 .0260(10) H(31') .0656 .1400 -0.1003 .0360(10)