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Intramolecular Hydrogen Bonding in Complexes Containing Bicyclic Guanidine Ligands

journal contribution
posted on 2023-06-08, 09:56 authored by Sarah H Oakley, Delia B Soria, Martyn P Coles, Peter B Hitchcock
A series of complexes with the general formula MX2(hppH)2 [hppH = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine: 1, M = Mn, X = Cl; 2, M = Fe, X = Cl; 3, M = Ni, X = Cl; 4 M = Zn, X = Br] have been synthesized and structurally characterized. In all cases, the neutral guanidine ligand bonds through the imine nitrogen atom to a tetrahedral metal centre, with additional interaction between the secondary amino NH and the metal bound halide. The intramolecular hydrogen bonding gives two isomeric forms in the solid-state, referred to as ¿ and ¿, which co-crystallize in the unit cell. An example of intramolecular hydrogen bonding from the neutral hppH to oxygen within the dimeric core lithiated siloxide, [Ph3SiOLi(hppH)(THF)]2 (5), is also reported.

History

Publication status

  • Published

Journal

Polyhedron

ISSN

0277-5387

Publisher

Elsevier

Issue

5

Volume

25

Page range

1247-1255

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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