Crystal structures of bis-11-aminoundecanoic chlorocuprate and bis-11-aminoundecanoic-Cu(II) sulfate trihydrate

Bis-11-aminoundecanoic chlorocuprate: (I),M _r =609.5, triclinic,P¯1 (No. 2),a=7.237(1),b=7.536(1),c=27.605(2) Å, =97.98(8),=92.45(8), =90.02(8)°,V _c =1492 ų,Z=2,D _x =1.357 g cm^–3,D _m =1.35(1) g cm^–3 (flotation), =43.85 cm^–1, CuK radiation=1.5418 Å,F(000)=642,T=23 °C,R=0.065 for 4121 observed reflections. Bis-11-aminoun-decanoic sulfate Cu(II) trihydrate: (II),M _r =616.4, triclinic,P¯1,a=7.745(2),b=9.553(4),c=20.343(5) Å, =80.91(3),=79.28(2), =87.58(3)°,V _c =1460 ų,Z=2,D _x =1.40(1) g cm^–3,D _m =1.38(2) g cm^–3 (flotation),=8.16 cm^–1, MoK radiation=0.71069 Å,F(000)=658,T=23°C,R=0.064 for 3384 observed reflections. In (I) the two copper ions are in special positions 0, 0, 0 and 1/2, 1/2, 0 octahedrally coordinated to Cl^–. The CuCl ₂ ^2– ions make square planes with the short bonds of mean values 2.289 and 2.295 Å. The carbonyls are hydrogen bonded, and the conformation of the amino acid chains ist for whole chain except at C(11) of chainA and N of chainB where it isg. In (II) Cu²⁺ shows a very distorted octahedral coordination with a mean value of 1.959 Å for the short bonds Cu-O and 2.512 Å for the long bonds. TheB amino acid chain presents a similar conformation change at C(11) as in theA chain of complex (I).