Additions and corrections
Synthesis and crystal structures of lanthanide 4-benzyloxy benzoates: Influence of electron-withdrawing and electron-donating groups on luminescent properties
Sarika Sivakumar, M.L.P. Reddy, Alan H. Cowley and Kalyan V. Vasudevan
Dalton Trans., 2010, 39, 776–786 (DOI: 10.1039/b917256d). Amendment published 7th October 2010.
Unfortunately, some errors in the interpretation of the crystal structure of compound 2 were reported in our article. These are listed below:
Abstract
Page No: 776
Read lines 7–8 as:
Compounds 1 and 2 crystallize in the monoclinic space group P21/n. The molecular structure of 1 consists of homodinuclear species that are bridged by two oxygen atoms from two benzoate ligands.
Read line 10 as:
By contrast, the X-ray structure of 2 reveals that each Tb3+ ion is connected to two neighboring ions by four methoxy substituted benzoates via the carboxylate groups in bridging mode to form an infinite one-dimensional coordination polymer.
Results and Discussion
Page No: 777 (Right Hand side panel)
Read Line 10 as: "chelate modes.12"
X-ray Crystallography
Page no: 777
Read Line 2 as:
Tb2(L2)6(H2O)4 (2)
Read lines 7 to 11 as:
Complex 1 is dimeric and features two Tb3+ ions surrounded by six 4-benzyloxy benzoic acid ligands. On the other hand, the X-ray structure of 2 reveals that each Tb3+ ion is connected to two neighboring ions by four methoxy substituted benzoate ligands via the carboxylate groups to form an infinite one-dimensional coordination polymer. The crystal structures of 1 and 2 both feature an inversion center thus indicating that terbium ions reside in equivalent chemical environments.
Page no.778
Read Fig. 2 as:
Fig. 2 Asymmetric unit of complex 2 with capped stick model and all hydrogen atoms are omitted for clarity.
Page no: 779 (left panel)
Read Line 16:
Read the word "three" as "two"
Page no: 779 (left to right panels)
Read lines 19 (left panel) to lines 1–12 (right panel) as:
In turn, the carboxylato groups O8–C31–O14 and O5–C16–O11 adopt a bridging binding mode in which two O atoms coordinate to two different Tb3+ ions to form a bidentate bridge. Finally, the coordination sphere of the metal ion is completed by ligation of two water molecules bonded via O(12) and O(13), thus resulting in a coordination number of eight at each Tb3+ center. The shortest Tb–O bond distance is associated with the bridging carboxylate ligand [Tb(1)–O(5): 2.273 Å] and the longest such bonds are formed by the bidentate chelating carboxylate ligand [Tb(1)–O(2): 2.504 Å].
Page No: 783
Read lines 6–12 under conclusions, as:
The X-ray crystal structure of compound 1 reveals that the new terbium complex is dimeric in nature, in contrast to the compound 2, which exists as one-dimensional coordination polymer. Another noteworthy feature of the new complexes relates to the existence of two different types of benzoato binding modes, viz. bridging bidentate and bidentate chelating.
Page no: 785
Read line 9 as: Tb2(L2)6(H2O)4 (2)
The Royal Society of Chemistry apologises for this error and any consequent inconvenience to authors and readers.