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The optical sensor fac-tricarbonylchloro(di-2-pyridylmethanone p-nitrophenylhydrazone)rhenium(I) dimethyl sulfoxide solvate (2001)

Bakir, Mohammed

Oxford [u.a.] : International Union of Crystallography (IUCr)

Acta crystallographica 57 (2001), S. 1371-1373

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ISSN: 1600-5759

Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Topics: Chemistry and Pharmacology , Geosciences , Physics

Notes: The first metal complex of di-2-pyridylmethanone p-nitrophenylhydrazone (dpknph), i.e. the title compound, fac-[ReCl(C17H13N5O2)(CO)3]·C2H6OS, crystallizes as well separated pseudo-tetrahedral DMSO (DMSO is dimethyl sulfoxide) and pseudo-octahedral fac-[ReCl(dpknph)(CO)3] moieties. Two N atoms from dpknph, three C atoms from the carbonyl groups and one chloride ion occupy the coordination sphere around rhenium. The coordinated dpknph ligand forms a six-membered ring in a boat conformation, with the pyridine rings in a butterfly formation. The p-nitrophenylhydrazone moiety is planar, with all C and N atoms in sp2-hybridized forms. The molecules pack as stacks of interlocked fac-[ReCl(dpknph)(CO)3]·DMSO units via a network of non-covalent bonds that include solute–solute, solvent–solute and π–π interactions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1107/S0108270101013890

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Electro-optical properties of the first rhenium-hydrazone complex, fac-Re(CO)3(dpknph)*Cl (1999)

Bakir, Mohammed ; Abdur-Rashid, Kamaluddin

Springer

Transition metal chemistry 24 (1999), S. 384-388

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ISSN: 1572-901X

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract Reaction between Re(CO)5Cl and dpknph in PhMe under reflux gave fac-Re(CO)3(dpknph)Cl in good yield. Both dpknph and fac-Re(CO)3(dpknph)Cl exhibit rich electro-optical properties that are sensitive to their surroundings and point to the potential use of these compounds in nonlinear optics and molecular sensing. Spectroscopic and electrochemical measurements on solutions of dpknph and fac-Re(CO)3(dpknph)Cl show that the metal complex undergoes faster electron/charge-transfer than the free ligand. Solvent variations show that the rate increases in the following order: DMSO〉DMF〉MeCN.