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Synthesis and crystal structures of the 15-crown-5 solvates of potassium- and rubidium-2-trimethylsilylamidopyridine

Lookup NU author(s): Dr Stephen Liddle, Emeritus Professor Bill Clegg

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Abstract

Metathesis of "[Li(PyNSiMe3)(15C5)]" (15C5 = 15-crown-5 ether) with potassium tert-butoxide or rubidium 2-ethylhexoxide yields the two new amide complexes [{K(PyNSiMe3)(mu-15C5)}(2)] (3) and [{Rb(mu-PyNSiMe3)(15C5)}(2)] (4). X-ray crystallography reveals 3 to be a 'slipped' centrosymmetric dimer, in which the crown ethers exhibit a bridging coordination mode via one crown oxygen from each crown to form a (KO)(2) four-membered ring; the amide adopts a terminal chelating mode. In contrast, 4 is a centrosymmetric amido-bridged dimer with a transoid (RbN)(2) core having additional bonding via bridging pyridyl groups; the crown ethers cap both ends of the dimer. (C) 2002 Elsevier Science Ltd. All rights reserved.


Publication metadata

Author(s): Liddle ST, Clegg W

Publication type: Article

Publication status: Published

Journal: Polyhedron

Year: 2002

Volume: 21

Issue: 23

Pages: 2451-2455

ISSN (print): 0277-5387

ISSN (electronic): 1873-3719

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/S0277-5387(02)01225-1

DOI: 10.1016/S0277-5387(02)01225-1


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