Additions and corrections

Synthesis and characterisation of ruthenium dihydrogen complexes and their reactivity towards B–H bonds

Jong-Hoo Choi, Nils E. Schloerer, Josefine Berger and Martin H. G. Prechtl

Dalton Trans., 2014, 43, 290–299 (DOI: 10.1039/DOI: c3dt52037d). Amendment published 11th March 2014.

In the paper, the authors omitted the following information:

p. 290, right column, line 10 (additional references):
In addition to the ref. 13 and 14 the following references A1-4 should be added regarding general approaches with pincer complexes for catalytic amine borane dehydrogenation:
A1. A. Friedrich, M. Drees and S. Schneider, Chem. Eur. J., 2009, 15, 10339-10342.
A2. M. Kass, A. Friedrich, M. Drees and S. Schneider, Angew. Chem. Int. Ed., 2009, 48, 905-907.
A3. A. Staubitz, M. E. Sloan, A. P. M. Robertson, A. Friedrich, S. Schneider, P. J. Gates, J. S. A. D. Gunne and I. Manners, J. Am. Chem. Soc., 2010, 132, 13332-13345.
A4. B. Askevold, H. W. Roesky and S. Schneider, Chemcatchem, 2012, 4, 307-320.
20 p. 290, right column, line 15-18; the sentence should be read as: “Besides complex 3, Schneider et al. reported formation of ruthenium hydride complexes (4 and 5) during ruthenium nitride hydrogenolysis to ammonia.19
p. 291, left column, line 1-7; the sentences should be read as: “The spectroscopic evidence was provided by NMR relaxation time measurements and DFT calculations. The authors found for complex 4 respectively for complex 5 H–H distances of 1.57 Å and 1.31 Å.”
p. 291, left column, penultimate line (add ref. 19): The ref. 19 should be cited regarding the NMR data of complexes 4 and 5.
p. 291, right column, line 2-3 (change to): “[Ru(H2)H2(HPNP)] 4
p. 291, right column, line 5 (change to): “[Ru(H2)H(PNP)] 5
p. 291, right column, line 11 (additional explanations and references to be inserted as footnote): “Footnote: In this work, for the reported H-H bond length calculations rapid ligand spinning has been considered and not slow motion.A5 On the NMR time scale we observed in the whole temperature range no decoalescence of the single hydride/dihydrogen signal which is characteristic for cis hydrido dihydrogen complexes.A6 Moreover, in case of slow motion decoalescence of the signal should occur due to “magnetic or chemical inequivalence of the two nuclei” in the dihydrogen ligand.A5 This has not been observed. Additionally, rapid spinning occurs when the H2-ligand is situated trans to a classical hydride ligand, like in the equatorial plane of complex 4 or 5.A5 However, a trans situation of H2 to the N-ligand in a [Ru(H2)H2(PNP)] is not possible (see ref. 3). Therefore, the calculation considers rapid rotation of the H2 ligand which is related to a low energy barrier for rotation.A5 Moreover, due to the dynamic exchange with the classical hydrides, and higher T1(min) values for classical hydrides, the reported overall T1(min) values for the H2 ligand can be assigned only as upper limit for the distance in the coordinated H2 moiety (see ref. 18). Consequently we calculated the H-H distance considering rapid spinning and not slow motion of the ligand.”
A5. R. H. Morris, Coord. Chem. Rev., 2008, 252, 2381-2394.
A6. S. Sabo-Etienne and B. Chaudret, Coord. Chem. Rev., 1998, 178, 381-407.
p. 292, left column, line 17-18; the sentence should be read as follows including new citations: “The lability of tetrahydride 4 in equilibrium with 5 can be explained by the cooperative properties of the H-PNP pincer backbone, according to the observations by other groups with similar systems.A2, A4, A7-9.”
A7. A. Friedrich, M. Drees, M. Kass, E. Herdtweck and S. Schneider, Inorg. Chem., 2010, 49, 5482-5494.
A8. S. Schneider, J. Meiners and B. Askevold, Eur. J. Inorg. Chem., 2012, 412-429.
A9. T. C. Wambach, J. M. Ahn, B. O. Patrick and M. D. Fryzuk, Organometallics, 2013, 32, 4431-4439.
p. 292, right column, line 5; additional reference: A8
p. 294, left column, last paragraph, first sentence should be read as: “The structure of complex 11 (Fig. 8, Table 1) was tentatively determined also by X-ray analysis, however we are aware of the limitations of this technique regarding metal hydrides and related compounds.”
p. 295, right column, line 3 (delete): “rigid”
p. 295, right column, line 6-10; compare to original citations: 4, 13, 15, 24
p. 296, left column, line 28 (change to): “Synthesis of [Ru(H2)H2(H-PNP)] 4
and [Ru(H2)H(PNP)] 5
p. 296, left column, line 29-31 (change to): “[…]H-PNP ligand 8[…].”

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