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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/7539

Title: Tellurium azamacrocycles: synthesis, characterization and coordination studies
Authors: MENON, SC
PANDA, A
SINGH, HB
PATEL, RP
KULSHRESHTHA, SK
DARBY, WL
BUTCHER, RJ
Keywords: x-ray structure
macrocyclic schiff-base
antimony(iii) halide-complexes
metal-carbonyl-complexes
crystal-structures
transition-metal
platinum(ii) complexes
structural-properties
selenium coronands
ring contraction
Issue Date: 2004
Publisher: ELSEVIER SCIENCE SA
Citation: JOURNAL OF ORGANOMETALLIC CHEMISTRY, 689(9), 1452-1463
Abstract: The metal-free condensation of bis(2-formylphenyl) telluride (1) with a series of diamines affords macrocyclic tellurium ligands 2 7. Crystals of the protonated macrocycle 8 are monoclinic, space group P2/n with a = 10.890(5), b = 7.414(4), c = 24.334(13) A, Z = 2. The reaction of tellurium containing macrocyclic Schiff base 2 with Pd(C6H5CN)(2)Cl-2 gives the expected 1: 1 product [Pd(II) 2] Cl-2 (9). Complex 9 was treated with excess of NH4PF6 in methanol to give the analogous PF6- salt [Pd(II) 2] (PF6)(2) (10). The crystals of 10 are monoclinic, space group P2(1)/n, a = 8.2250(10), b = 21.280 (4), c = 21.150 (4), Z = 4. However, the reaction of 2 with Pt(COD)Cl-2 proceeds via novel transmetallation to yield an organoplatinurn complex (11). The crystals of 11 are also monoclinic, space group P2(1)/n, a = 12.3253 (14), b = 14.6557 (14), C = 13.4054 (11), Z = 4. The octahedral Ni(11) complex 12 was prepared by the reaction of NiCl2 . 6H(2)O with 2 and NH4PF6 under an inert atmosphere. For 12: triclinic, space group P (1) over bar; Z = 2; a = 10.800(8), b = 13.468(9), c = 13.918(11), alpha = 89.67(6)degrees, beta = 101.53(7)degrees, gamma = 81.49(3)degrees and V = 1961(3). Cyclic voltammetry of 12 in MeCN solution shows a well-behaved quasi-reversible (DeltaE = 100 mV) Ni(Ill) <----> Ni(11) couple. (C) 2004
URI: http://dx.doi.org/10.1016/j.jorganchem.2003.12.042
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7539
http://hdl.handle.net/10054/7539
ISSN: 0022-328X
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