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


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

Metal Oxidation state: Cu(I) d10

Give a name for the coordination geometry about the Cu(I) metal center




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

Metal Oxidation state: Cu(I) d10

Give a name for the coordination geometry about each of the Cu(I) metal centers




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

Metal Oxidation state: Cu(II) d9

Give a name for the coordination geometry about the Cu(II) metal center




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

Resources developed by Marion E. Cass, Carleton College 2015; Questions for students in red font