An ethylene cross-bridged pentaazamacrocycle and its Cu2+ complex: constrained ligand topology and excellent kinetic stability

Anthony D. Shircliff; Benjamin P. Burke; Dustin J. Davilla; Gwendolyn E. Burgess; Faith A. Okorocha; Alina Shrestha; Elisabeth M. A. Allbritton; Phillip T. Nguyen; Rachael L. Lamar; Donald G. Jones; Michael-Joseph Gorbet; Michael B. Allen; John I. Eze; Andrea T. Fernandez; Daniel Ramirez; Stephen J. Archibald; Timothy J. Prior; Jeanette A. Krause; Allen G. Oliver; Timothy J. Hubin

doi:10.1039/D0CC00919A

An ethylene cross-bridged pentaazamacrocycle and its Cu²⁺ complex: constrained ligand topology and excellent kinetic stability†

Anthony D. Shircliff,^a Benjamin P. Burke,^b Dustin J. Davilla,^a Gwendolyn E. Burgess,^a Faith A. Okorocha,^a Alina Shrestha,^a Elisabeth M. A. Allbritton,^a Phillip T. Nguyen,^a Rachael L. Lamar,^a Donald G. Jones,^a Michael-Joseph Gorbet,^a Michael B. Allen,

^a John I. Eze,^a Andrea T. Fernandez,^a Daniel Ramirez,^a Stephen J. Archibald,

^b Timothy J. Prior,^c Jeanette A. Krause,^d Allen G. Oliver^e and Timothy J. Hubin

*^a

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* Corresponding authors

^a Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
E-mail: tim.hubin@swosu.edu

^b Positron Emission Tomography Research Centre, Department of Biomedical Sciences University of Hull Cottingham Road Hull, UK

^c Department of Chemistry, University of Hull, Cottingham Road, Hull, UK

^d Department of Chemistry, University of Cincinnati, 301 Clifton Ct., Cincinnati, OH 45221-0172, USA

^e Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA

Abstract

Rigid and topologically constrained ethylene cross-bridged tetraazamacrocycles have been increasingly utilised for thirty years as they form remarkably stable transition metal complexes for catalysis, biomedical imaging, and inorganic drug molecule applications. Extending these benefits to pentaazamacrocycles has been achieved and a first transition metal complex prepared and structurally characterized.

Chemical Communications

An ethylene cross-bridged pentaazamacrocycle and its Cu²⁺ complex: constrained ligand topology and excellent kinetic stability†

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An ethylene cross-bridged pentaazamacrocycle and its Cu²⁺ complex: constrained ligand topology and excellent kinetic stability

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