{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,22]],"date-time":"2025-11-22T16:45:44Z","timestamp":1763829944305,"version":"build-2065373602"},"reference-count":39,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2004,2,17]],"date-time":"2004-02-17T00:00:00Z","timestamp":1076976000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Eur J Inorg Chem"],"published-print":{"date-parts":[[2004,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Rhodium complexes of formula [RhBp(CO)P] [Bp = bis(pyrazolylborate), P = P(NC<jats:sub>4<\/jats:sub>H<jats:sub>4<\/jats:sub>)<jats:sub>3<\/jats:sub> <jats:bold>1<\/jats:bold>, PPh<jats:sub>3<\/jats:sub> <jats:bold>2<\/jats:bold>, PCy<jats:sub>3<\/jats:sub> <jats:bold>3<\/jats:bold>, P(C<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub>OMe\u20104)<jats:sub>3<\/jats:sub> <jats:bold>4<\/jats:bold>] have been prepared by exchange of the acetylacetonate (acac<jats:sup>\u2212<\/jats:sup>) ligand in [Rh(acac)(CO)P] complexes. The spectroscopic and electrochemical properties as well as X\u2010ray data of [Rh(acac)(CO)P] and [RhBp(CO)P] complexes have been compared with the aim to estimate the relative donor properties of both anionic ligands (acac<jats:sup>\u2212<\/jats:sup> and Bp<jats:sup>\u2212<\/jats:sup>). The cyclic voltammetric results indicate that the Bp<jats:sup>\u2212<\/jats:sup> ligand behaves as a much stronger electron donor than acac<jats:sup>\u2212<\/jats:sup> and a value of the Lever <jats:italic>E<\/jats:italic><jats:sub>L<\/jats:sub> ligand parameter identical to that of the pyrazolate ligand (\u22120.24 V vs. NHE for each coordinating arm) is proposed for the bis\u2010 and tris(pyrazolyl)borate ligands, whereas P(C<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub>OMe\u20104)<jats:sub>3<\/jats:sub> is also shown to have an identical <jats:italic>E<\/jats:italic><jats:sub>L<\/jats:sub> value (0.69 V) to that of P(NC<jats:sub>4<\/jats:sub>H<jats:sub>4<\/jats:sub>)<jats:sub>3<\/jats:sub>. An improved linear relationship between the oxidation potential and the sum of the ligand <jats:italic>E<\/jats:italic><jats:sub>L<\/jats:sub> values for square\u2010planar Rh<jats:sup>I<\/jats:sup> complexes is also obtained and adjusted values for the Lever <jats:italic>S<\/jats:italic><jats:sub>M<\/jats:sub> and <jats:italic>I<\/jats:italic><jats:sub>M<\/jats:sub> parameters for the Rh<jats:sup>I<\/jats:sup>\/Rh<jats:sup>II<\/jats:sup> redox couple are given. The <jats:italic>trans<\/jats:italic> influence of phosphanes was not observed in crystals of complexes <jats:bold>2<\/jats:bold> and <jats:bold>3<\/jats:bold>, in contrast to analogous acetylacetonato complexes in which the Rh\u2212O bonds differ by ca. 0.04\u22120.06 \u00c5. Complexes <jats:bold>1<\/jats:bold>\u2212<jats:bold>4<\/jats:bold> are very attractive precursors for hydroformylation catalysts and yields of aldehydes of 80\u221287% have been obtained with all complexes without extra phosphane as co\u2010catalyst. During the hydroformylation reaction, however, small amounts of a catalytically inactive [RhBp(CO)<jats:sub>2<\/jats:sub>] complex were formed. (\u00a9 Wiley\u2010VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2004)<\/jats:p>","DOI":"10.1002\/ejic.200300517","type":"journal-article","created":{"date-parts":[[2004,3,23]],"date-time":"2004-03-23T08:43:15Z","timestamp":1080031395000},"page":"1411-1419","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":43,"title":["Structure, Electrochemistry and Hydroformylation Catalytic Activity of the Bis(pyrazolylborato)rhodium(<scp>I<\/scp>) Complexes [RhBp(CO)P] [P = P(NC<sub>4<\/sub>H<sub>4<\/sub>)<sub>3<\/sub>, PPh<sub>3<\/sub>, PCy<sub>3<\/sub>, P(C<sub>6<\/sub>H<sub>4<\/sub>OMe\u20104)<sub>3<\/sub>]"],"prefix":"10.1002","volume":"2004","author":[{"given":"Anna\u00a0M.","family":"Trzeciak","sequence":"first","affiliation":[]},{"given":"Beata","family":"Borak","sequence":"additional","affiliation":[]},{"given":"Zbigniew","family":"Ciunik","sequence":"additional","affiliation":[]},{"given":"J\u00f3zef\u00a0J.","family":"Zi\u00f3\u0142kowski","sequence":"additional","affiliation":[]},{"given":"M.\u00a0F\u00e1tima\u00a0C.","family":"Guedes da Silva","sequence":"additional","affiliation":[]},{"given":"Armando\u00a0J. 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