Copper(II) Complexes of the Hexaaza Macrocyclic Ligand 3,6,9,16,19

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Inorg. Chem. 1996, 35, 7462

Additions and Corrections 1996, Volume 35 Qin Lu, Joseph H. Reibenspies, Arthur E. Martell,* and Ramunas J. Motekaitis: Copper(II) Complexes of the Hexaaza Macrocyclic Ligand 3,6,9,16,19,22-Hexaaza-27,28dioxatricyclo [ 22.2.1.111,14 ] octacosa-1 (26) ,11 ,13 ,24 - tetraene and Their Interaction with Oxalate, Malonate, and Pyrophosphate Anions. Pages 2630-2636. The structure of (3,6,9,16,19,22-hexaaza27,28-dioxatricyclo[22.2.1.1]octacosa-1(26),11,13,24-tetraene)(oxalato)copper(II) bis(tetrafluoroborate) was originally refined in the space group P1 (No. 1). This was due, in part, to the assumption of a chlorine impurity in the data collection crystal. Unfortunately the refined structure contained many gross errors and could not be refined anisotropically. After much discussion it was decided to drop the chlorine contamination hypothesis and refine the structure in the space group P1h (No. 2) (Marsh, R. E. Private communication). The anisotropic refinement proceeded without incident, and the results are given in the Supporting Information. A large residual electron density peak (1.043 e Å-3) is still seen near a fluorine [1.32(1) Å] of the BF4. The nature of this peak indicates that some chlorine contaminant may be present; however, the overall improvement of the structure dictates that the centrosymmetric refinement is correct. The authors wish to thank Prof. R. E. Marsh for bringing this error to their attention and for his helpful and friendly comments. Supporting Information Available: A thermal ellipsoid projection with atom labeling and tables of crystal data, atomic coordinates, and interatomic distances and angles (5 pages). An X-ray crystallographic file, in CIF format, is also available. Access and ordering information is given on any current masthead page. IC960914F

1996, Volume 35 Kausik K. Nanda, Anthony W. Addison,* Ekkehard Sinn, and Laurence K. Thompson: Helical Antiferromagnetic Copper(II) Chains with a Collagen Structural Motif. Page 5966. Anthony W. Addison’s e-mail address should read [email protected]. IC961985H

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© 1996 American Chemical Society