@article{brown_lilly_lambic_sommer_ison_2020, title={Synthesis and Reactivity of Re(III) and Re(V) Fischer Carbenes}, volume={39}, ISSN={["1520-6041"]}, DOI={10.1021/acs.organomet.9b00600}, abstractNote={Direct insertion of CO and isocyanides, RNC, into Re–R bonds results in high-oxidation-state acyl and iminoacyl complexes that can be treated with an electrophile to generate rare examples of rheni...}, number={3}, journal={ORGANOMETALLICS}, author={Brown, Caleb A. and Lilly, Cassandra P. and Lambic, Nikola S. and Sommer, Roger D. and Ison, Elon A.}, year={2020}, month={Feb}, pages={388–396} }
 @article{lambic_sommer_ison_2018, title={High-valent nitridorhenium(V) complexes containing PNP ligands: implications of ligand flexibility}, volume={47}, ISSN={["1477-9234"]}, url={https://doi.org/10.1039/C7DT03615A}, DOI={10.1039/c7dt03615a}, abstractNote={The synthesis of (PNP)Re(N)X (PNP = [2-P(CHMe2)2-4-MeC6H3]2N, X = Cl and Me) complexes is described.}, number={3}, journal={DALTON TRANSACTIONS}, publisher={Royal Society of Chemistry (RSC)}, author={Lambic, Nikola S. and Sommer, Roger D. and Ison, Elon A.}, year={2018}, month={Jan}, pages={758–768} }
 @article{lambic_brown_sommer_ison_2017, title={Dramatic Increase in the Rate of Olefin Insertion by Coordination of Lewis Acids to the Oxo Ligand in Oxorhenium(V) Hydrides}, volume={36}, ISSN={["1520-6041"]}, DOI={10.1021/acs.organomet.7b00291}, abstractNote={In this work we show that classic coordination of the oxo group in an oxorhenium hydride complex to M(C6F5)3 (M = Al, B) leads to dramatic increases in the rate of migratory olefin insertion. Combined experimental and computational studies have been utilized to understand the reasons for the rate enhancement upon coordination of the oxo group to the Lewis acid. The mechanism for migratory insertion involves coordination of the olefin to rhenium in the equatorial plane. This induces mixing of the rhenium–hydride σ bond with a rhenium–oxygen π* orbital. This results in an accumulation of electron density on the oxo ligand. The Lewis acid lowers the barrier for migratory insertion by diminishing the electron density on the oxo ligand in the transition state.}, number={10}, journal={ORGANOMETALLICS}, publisher={American Chemical Society (ACS)}, author={Lambic, Nikola S. and Brown, Caleb A. and Sommer, Roger D. and Ison, Elon A.}, year={2017}, month={May}, pages={2042–2051} }
 @article{lambic_sommer_ison_2017, title={Tuning Catalytic Activity in the Hydrogenation of Unactivated Olefins with Transition-Metal Oxos as the Lewis Base Component of Frustrated Lewis Pairs}, volume={7}, ISSN={["2155-5435"]}, DOI={10.1021/acscatal.6b03313}, abstractNote={The steric and electronic demands of the catalytic olefin hydrogenation of tert-butylethylene with oxorhenium/Lewis acid FLPs were evaluated. The sterics of the ligand were altered by installing bulkier isopropyl groups in the 2,6-positions of the diamidopyridine (DAP) ligand. Lewis acid/base adducts were not isolated for complexes with this ligand; however, species incorporating isopropyl groups were still active in catalytic hydrogenation. Modifications were also made to the Lewis acid, and catalytic reactions were performed with Piers’ borane, HB(C6F5)2, and the aluminum analogue Al(C6F5)3. The rate of catalytic hydrogenation was shown to strongly correlate with the size of the alkyl, aryl, or hydride ligand. This was confirmed by a linear Taft plot with the steric sensitivity factor δ = −0.57, which suggests that reaction rates are faster with sterically larger X substituents. These data were used to develop a catalyst ((MesDAP)Re(O)(Ph)/HB(C6F5)2) that achieved a TON of 840 for the hydrogenation of t...}, number={2}, journal={ACS CATALYSIS}, publisher={American Chemical Society (ACS)}, author={Lambic, Nikola S. and Sommer, Roger D. and Ison, Elon A.}, year={2017}, month={Feb}, pages={1170–1180} }
 @article{lambic_lilly_sommer_ison_2016, title={Mechanism for the Reaction of CO with Oxorhenium Hydrides: Migratory Insertion of CO into Rhenium Hydride and Formyl Bonds leads to Migration from Rhenium to the Oxo Ligand}, volume={35}, ISSN={["1520-6041"]}, DOI={10.1021/acs.organomet.6b00591}, abstractNote={Computational studies (M06) have been performed in synergy with experimental studies to show that the thermodynamics for insertion of CO into an oxorhenium–hydride bond to form a formyl ligand is favorable despite conventional wisdom to the contrary. Further, it is shown that insertion of CO into formyl ligands to form α-dicarbonyl ligands is also a viable pathway and results in hydroxy carbonyl or formate complexes, depending on the nature of the ancillary ligand.}, number={17}, journal={ORGANOMETALLICS}, publisher={American Chemical Society (ACS)}, author={Lambic, Nikola S. and Lilly, Cassandra P. and Sommer, Roger D. and Ison, Elon A.}, year={2016}, month={Sep}, pages={3060–3068} }
 @article{frasco_mukherjee_sommer_perry_lambic_abboud_jakubikoya_ison_2016, title={Nondirected C-H Activation of Arenes with Cp*Ir(III) Acetate Complexes: An Experimental and Computational Study}, volume={35}, ISSN={["1520-6041"]}, DOI={10.1021/acs.organomet.6b00308}, abstractNote={Combined experimental and computational studies have revealed factors that influence the nondirected C–H activation in Cp*Ir complexes that contain carboxylate ligands. A two-step acetate-assisted pathway was shown to be operational where the first step involves substrate binding and the second step involves cleavage of the C–H bond of the substrate. A nonlinear Hammett plot was obtained to examine substituted arenes where a strong electronic dependence (ρ = 1.67) was observed for electron-donating groups, whereas no electronic dependence was observed for electron-withdrawing groups. Electron-donating substituents in the para position were shown to have a bigger impact on the C–H bond cleavage step, whereas electron-withdrawing substituents influenced the substrate-binding step. Although cleavage of the C–H bond was predicted to be more facile with arenes that contain substituents in the para position by DFT calculations, the cyclometalations of anisole and benzonitrile were observed experimentally. This ...}, number={15}, journal={ORGANOMETALLICS}, publisher={American Chemical Society (ACS)}, author={Frasco, Daniel A. and Mukherjee, Sriparna and Sommer, Roger D. and Perry, Cody M. and Lambic, Nikola S. and Abboud, Khalil A. and Jakubikoya, Elena and Ison, Elon A.}, year={2016}, month={Aug}, pages={2435–2445} }
 @article{lambic_lilly_robbins_sommer_ison_2016, title={Reductive Carbonylation of Oxorhenium Hydrides Induced by Lewis Acids}, volume={35}, ISSN={["1520-6041"]}, DOI={10.1021/acs.organomet.6b00393}, abstractNote={Several oxorhenium hydride complexes with chelating diamidopyridine (DAP), diamidoamine (DAAm), and 2-mercaptoethyl sulfide (SSS) groups have been isolated and characterized. Adduct formation is observed when the DAP complex 1a is treated with the Lewis acid B(C6F5)3. However, treatment of 1a,b with B(C6F5)3 or BF3·OEt2 in the presence of CO results in reduction of the metal center by four electrons from Re(V) to Re(I).}, number={17}, journal={ORGANOMETALLICS}, publisher={American Chemical Society (ACS)}, author={Lambic, Nikola S. and Lilly, Cassandra P. and Robbins, Leanna K. and Sommer, Roger D. and Ison, Elon A.}, year={2016}, month={Sep}, pages={2822–2829} }
 @article{lambic_sommer_ison_2016, title={Transition-Metal Oxos as the Lewis Basic Component of Frustrated Lewis Pairs}, volume={138}, ISSN={["1520-5126"]}, DOI={10.1021/jacs.6b00705}, abstractNote={The reaction of oxorhenium complexes that incorporate diamidopyridine (DAP) ligands with B(C6F5)3 results in the formation of classical Lewis acid-base adducts. The adducts effectively catalyze the hydrogenation of a variety of unactivated olefins at 100 °C. Control reactions with these complexes or B(C6F5)3 alone did not yield any hydrogenated products under these conditions. Mechanistic studies suggest a frustrated Lewis pair is generated between the oxorhenium DAP complexes and B(C6F5)3, which is effective at olefin hydrogenation. Thus, we demonstrate for the first time that the incorporation of a transition-metal oxo in a frustrated Lewis pair can have a synergistic effect and results in enhanced catalytic activity.}, number={14}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, publisher={American Chemical Society (ACS)}, author={Lambic, Nikola S. and Sommer, Roger D. and Ison, Elon A.}, year={2016}, month={Apr}, pages={4832–4842} }