Matches in SemOpenAlex for { <https://semopenalex.org/work/W156009942> ?p ?o ?g. }
Showing items 1 to 79 of
79
with 100 items per page.
- W156009942 abstract "Gas-phase photoelectron spectroscopy is used to evaluate the a-donation and 1t-acceptance abilities of a series of Group 15 ligands. The free ligands PMe(3-n)Ph(n) (n=0-3), EMe₃ (E=As) and EPh₃ (E=As, Sb, Bi) are examined (Me=CH₃, Ph=C₆H₅) and the trends in lone pair ionizations are discussed. Organometallic compounds investigated include CpMn(CO)2L (L=PPh₃, AsPh₃), Cp'Mn(CO)₂L (L=PPh₃, PMe₃, AsPh₃, SbPh₃), and Mo(CO)₅L (L=PMe₃, PPh₃). Contrary to initial predictions based on electronegativities and solution pKₐ's, the trend in ionization energies for the series PMe(3-n)Ph(n) is PPh₃ < PMePh₂ < PMe₂Ph < PMe₃. The trend in first ionizations is governed by a filled-filled interaction between the lone pair and phenyl rings. The metal ionization energies of organometallic compounds containing PMe₃ and PPh₃ reflect this trend indicating that the above order is also the order of a-donation. These metal ionizations also indicate that all members of the series, PMe(3-n)Ph(n), have the same amount of π-acceptance. Just as in the phenyl containing phosphine ligands, the ligands EPh₃ exhibit filled-filled interactions between the lone pair and phenyl orbitals, but not uniformly. This filled-filled interaction decreases with the heavier elements. The order of lone pair ionizations for EPh₃ is PPh₃ < AsPh₃, SbPh₃, BiPh₃. The destabilization expected upon descent of the periodic table is offset by the effects of decreasing relaxation energy and decreasing filled-filled interactions. Metal ionizations do not strictly follow the trends of the free ligands EPh₃. These metal ionization energies coincide for organometallic compounds where E is phosphorus or arsenic. Metal ionization energies for E=Sb are very slightly stabilized compared to E=P, As. The ligands EPh₃ display the same amount of σ and π interactions in the organometallic compounds examined. It is observed that the identity of R is more important in determining σ/π interactions than the element directly bound to the metal. This work serves to bring together previous literature and current experimental results to understand the structure and bonding in the ligands ER₃ (E=P, As, Sb, Bi and R=Me, Ph)." @default.
- W156009942 created "2016-06-24" @default.
- W156009942 creator A5004047180 @default.
- W156009942 date "1994-01-01" @default.
- W156009942 modified "2023-09-24" @default.
- W156009942 title "Electron donor and acceptor properties of trimethylphosphine, triphenylphosphine, and related ligands with transition metals by photoelectron spectroscopy." @default.
- W156009942 hasPublicationYear "1994" @default.
- W156009942 type Work @default.
- W156009942 sameAs 156009942 @default.
- W156009942 citedByCount "1" @default.
- W156009942 crossrefType "journal-article" @default.
- W156009942 hasAuthorship W156009942A5004047180 @default.
- W156009942 hasConcept C106773901 @default.
- W156009942 hasConcept C115624301 @default.
- W156009942 hasConcept C116569031 @default.
- W156009942 hasConcept C121332964 @default.
- W156009942 hasConcept C161790260 @default.
- W156009942 hasConcept C170493617 @default.
- W156009942 hasConcept C175708663 @default.
- W156009942 hasConcept C177293861 @default.
- W156009942 hasConcept C178790620 @default.
- W156009942 hasConcept C185592680 @default.
- W156009942 hasConcept C2775968720 @default.
- W156009942 hasConcept C2777247709 @default.
- W156009942 hasConcept C2777716191 @default.
- W156009942 hasConcept C32909587 @default.
- W156009942 hasConcept C46000676 @default.
- W156009942 hasConcept C46141821 @default.
- W156009942 hasConcept C544153396 @default.
- W156009942 hasConcept C55493867 @default.
- W156009942 hasConcept C71240020 @default.
- W156009942 hasConcept C8010536 @default.
- W156009942 hasConceptScore W156009942C106773901 @default.
- W156009942 hasConceptScore W156009942C115624301 @default.
- W156009942 hasConceptScore W156009942C116569031 @default.
- W156009942 hasConceptScore W156009942C121332964 @default.
- W156009942 hasConceptScore W156009942C161790260 @default.
- W156009942 hasConceptScore W156009942C170493617 @default.
- W156009942 hasConceptScore W156009942C175708663 @default.
- W156009942 hasConceptScore W156009942C177293861 @default.
- W156009942 hasConceptScore W156009942C178790620 @default.
- W156009942 hasConceptScore W156009942C185592680 @default.
- W156009942 hasConceptScore W156009942C2775968720 @default.
- W156009942 hasConceptScore W156009942C2777247709 @default.
- W156009942 hasConceptScore W156009942C2777716191 @default.
- W156009942 hasConceptScore W156009942C32909587 @default.
- W156009942 hasConceptScore W156009942C46000676 @default.
- W156009942 hasConceptScore W156009942C46141821 @default.
- W156009942 hasConceptScore W156009942C544153396 @default.
- W156009942 hasConceptScore W156009942C55493867 @default.
- W156009942 hasConceptScore W156009942C71240020 @default.
- W156009942 hasConceptScore W156009942C8010536 @default.
- W156009942 hasLocation W1560099421 @default.
- W156009942 hasOpenAccess W156009942 @default.
- W156009942 hasPrimaryLocation W1560099421 @default.
- W156009942 hasRelatedWork W1659284468 @default.
- W156009942 hasRelatedWork W1964179166 @default.
- W156009942 hasRelatedWork W1978949838 @default.
- W156009942 hasRelatedWork W1992086550 @default.
- W156009942 hasRelatedWork W1994447594 @default.
- W156009942 hasRelatedWork W1996608497 @default.
- W156009942 hasRelatedWork W2002922660 @default.
- W156009942 hasRelatedWork W2006318962 @default.
- W156009942 hasRelatedWork W2028348431 @default.
- W156009942 hasRelatedWork W2053891962 @default.
- W156009942 hasRelatedWork W2058601073 @default.
- W156009942 hasRelatedWork W2084528402 @default.
- W156009942 hasRelatedWork W2326288437 @default.
- W156009942 hasRelatedWork W2345449356 @default.
- W156009942 hasRelatedWork W2403919152 @default.
- W156009942 hasRelatedWork W2972604810 @default.
- W156009942 hasRelatedWork W3184356155 @default.
- W156009942 hasRelatedWork W814783149 @default.
- W156009942 hasRelatedWork W2026633512 @default.
- W156009942 hasRelatedWork W3141091018 @default.
- W156009942 isParatext "false" @default.
- W156009942 isRetracted "false" @default.
- W156009942 magId "156009942" @default.
- W156009942 workType "article" @default.