Di- and trinuclear complexes derived from hexakis(2-pyridyloxy)cyclotriphosphazene. Unusual P-O bond cleavage in the formation of [{(L'CuCl)2(Co(NO3)}Cl] (L' = N3P3(OC5H4N)5(O))

Inorganic Chemistry
Vadapalli ChandrasekharRamachandran Azhakar

Abstract

Hexakis(2-pyridyloxy)cyclotriphosphazene (L) is an efficient multisite coordination ligand which binds with transition metal ions to produce dinuclear (homo- and heterometallic) complexes [L(CuCl)(CoCl3)], [L(CuCl)(ZnCl3)], [L(CoCl)(ZnCl3)], and [L(ZnCl2)2]. In these dinuclear derivatives the cyclophosphazene ligand utilizes from five to six nitrogen coordination sites out of the maximum of nine available sites. Further, the spacer oxygen that separates the pyridyl moiety from the cyclophosphazene ring ensures minimum steric strain to the cyclophosphazene ring upon coordination. This is reflected in the near planarity of the cyclophosphazene ring in all the dinuclear derivatives. In the dinuclear heterobimetallic derivatives one of the metal ions [Cu(II) or Co(II)] is hexacoordinate and is bound by the cyclophosphazene in a eta5-gem-N5 mode. The other metal ion in these heterobimetallic derivatives [Co(II) or Zn(II)] is tetracoordinate and is bound in an eta(1)-N(1) fashion. In the homobimetallic derivative, [L(ZnCl2)2], one of the zinc ions is five-coordinate (eta3-nongem-N3), while the other zinc ion is tetracoordinate(eta2-gem-N2). The reaction of L with CuCl2 followed by Co(NO3)2.6H2O yields a trinuclear heterobimetallic co...Continue Reading

References

Jan 10, 2002·Inorganic Chemistry·Charles N Myer, Christopher W Allen
Mar 10, 2004·Bioorganic & Medicinal Chemistry Letters·Vadapalli ChandrasekharSandeep Verma
Apr 27, 2004·Inorganic Chemistry·Philip I Richards, Alexander Steiner
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Citations

Jun 5, 2012·Inorganic Chemistry·Serap BeşliAdem Kılıç
Dec 22, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Ramakirushnan Suriya Narayanan, Vadapalli Chandrasekhar
Oct 17, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Xingjun LiMaochun Hong
Oct 30, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Serap BeşliFatma Yuksel
Aug 12, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Dheeraj KumarAnil J Elias
Mar 13, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Vadapalli Chandrasekhar, Ramakirushnan Suriya Narayanan
Jun 1, 2016·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Derya DavarcıYunus Zorlu
May 21, 2009·Accounts of Chemical Research·Vadapalli Chandrasekhar, Balasubramanian Murugesapandian
Sep 27, 2008·Inorganic Chemistry·Eric W AinscoughMark R Waterland
May 29, 2010·Inorganic Chemistry·Karunesh KeshavAnil J Elias
Feb 15, 2008·Inorganic Chemistry·Vadapalli ChandrasekharBalasubramanian Murugesa Pandian
Dec 1, 2010·Inorganic Chemistry·Dheeraj KumarAnil J Elias

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