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Barr, D., Clegg, W., Hodgson, S.M., Mulvey, R.E., Reed, D., Snaith, R. and Wright, D.S. (1988) A Li8 Cluster of Three Edge-Connected Li4 Tetrahedra Held by Li-N, Li C, and Li Li Interactions: Crystal Structure of (o-LiC6H4CH2·NLi·CH2CH2NMe2)4 and Detection of Metal Metal Coupling within It by 7Li COSY n.m.r. Spectroscopy. Journal of the Chemical Society, Chemical Communications, 367-369.

has been cited by the following article:

• TITLE: The DQF-COSY NMR Experiment, a Way to Detect Small J Couplings in the Case of Fast Relaxing Nuclei: Application to 59Co in the Tetrahedral Mixed-Metal Cluster HRuCo3(CO)11(PPh3)

  AUTHORS: Jacky Rosé, Pierre Kempgens

  KEYWORDS: NMR, Cobalt-59, 2D COSY and DQF-COSY, Scalar Couplings, Tetrahedral Mixed-Metal Cluster

  JOURNAL NAME: Open Access Library Journal, Vol.1 No.3, June 16, 2014

  ABSTRACT: The first investigation and analysis of 59Co 2D NMR homonuclear chemical shift correlation spectra for a ruthenium-based tetrahedral mixed-metal cluster HRuCo3(CO)11(PPh3) are reported. For this cluster in solution and by contrast to the conventional COSY NMR experiment, the double-quantum filtered (DQF) COSY NMR spectrum proves the existence of a scalar coupling constant between 59Co nuclei. In order to obtain a value of this coupling, the 2D COSY spectrum for a three-spin 7/2 AX2 system has been simulated by numerical density matrix calculations. The comparison between experimental and theoretical 2D NMR COSY spectra gives a spin-coupling constant |1J(59Co-59Co)|