Contrasting the Structures of Cu(I) and Cu(II) complexes of Ligands Related to BCA


CuIL2+
bis(2,2'-Biquinolinyl)-copper(I) monocation
the tetrafluoroborate anion and one free ligand hav been removed for clarity of viewing
Note this ligand does not have the COOH groups found in BCA

Cu(I) d10




CCDC Code: DEFVIU
B.F.Ali, K.Al-Soud'od, N.Al-Ja'ar, A.Nassar, M.H.Zaghal, Z.Judeh,
R.Al-Far, M.Al-Refai, M.Ibrahim, K.Mansi, K.H.Al-Obaidi
J. Coord. Chem., Vol 59, p. 229, 2006,
R = 5.33
(μ2-I)2-[CuIL]2
bis((μ2-iodido)-(dimethyl 2,2'-biquinoline-4,4'-dicarboxylate-N,N'))di-copper(I)
Note: this ligand has COO(CH3) groups in place of the COOH groups found in BCA

Cu(I) d10




CCDC Ref Code: PAYKIL R.Starosta, U.K.Komarnicka, J.Nagaj, K.Stokowa-Soltys, A.Bykowska Acta Crystallogr., Sect. E: Struct. Rep. Online, Vol 68, m756, 2012
R = 2.68
CuIILCl2
(2,2'-Biquinoline-κ2-N,N')-dichloro-copper(II)
Note as in the most left panel; this ligand does not have the COOH groups found in BCA

Cu(II) d9




CCDC Ref Code: YASPEO
Y.Muranishi, Yue Wang, M.Odoko, N.Okabe Acta Crystallogr., Sect. C: Cryst. Struct. Commun., Vol 61 p. m307, 2005,
R = 4.53