Christopher J. O’Brien

5.6k total citations · 2 hit papers
34 papers, 5.0k citations indexed

About

Christopher J. O’Brien is a scholar working on Organic Chemistry, Inorganic Chemistry and Molecular Biology. According to data from OpenAlex, Christopher J. O’Brien has authored 34 papers receiving a total of 5.0k indexed citations (citations by other indexed papers that have themselves been cited), including 34 papers in Organic Chemistry, 7 papers in Inorganic Chemistry and 2 papers in Molecular Biology. Recurrent topics in Christopher J. O’Brien's work include Catalytic Cross-Coupling Reactions (20 papers), N-Heterocyclic Carbenes in Organic and Inorganic Chemistry (16 papers) and Synthetic Organic Chemistry Methods (12 papers). Christopher J. O’Brien is often cited by papers focused on Catalytic Cross-Coupling Reactions (20 papers), N-Heterocyclic Carbenes in Organic and Inorganic Chemistry (16 papers) and Synthetic Organic Chemistry Methods (12 papers). Christopher J. O’Brien collaborates with scholars based in Canada, United Kingdom and United States. Christopher J. O’Brien's co-authors include Michael G. Organ, Eric Assen B. Kantchev, Niloufar Hadei, Cory Valente, Gregory A. Chass, Stephanie Avola, Alan J. Lough, Alan C. Hopkinson, Igor Dubovyk and George T. Achonduh and has published in prestigious journals such as Angewandte Chemie International Edition, Chemical Communications and Nature Chemistry.

In The Last Decade

Christopher J. O’Brien

32 papers receiving 5.0k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Palladium Complexes of N‐Heterocyclic Carbenes as Catalysts for Cross‐Coupling Reactions—A Synthetic Chemist's Perspective

2007 1.5k citations Eric Assen B. Kantchev, Christopher J. O’Brien et al. Angewandte Chemie International Edition profile →
Easily Prepared Air‐ and Moisture‐Stable Pd–NHC (NHC=N‐Heterocyclic Carbene) Complexes: A Reliable, User‐Friendly, Highly Active Palladium Precatalyst for the Suzuki–Miyaura Reaction

2006 727 citations Christopher J. O’Brien, Eric Assen B. Kantchev et al. Chemistry - A European Journal profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Christopher J. O’Brien Canada	23	4.9k	835	339	178	113	34	5.0k
Corinne Gosmini France	37	4.0k 0.8×	761 0.9×	328 1.0×	134 0.8×	156 1.4×	102	4.3k
Tom G. Driver United States	38	4.5k 0.9×	1.0k 1.2×	457 1.3×	126 0.7×	82 0.7×	76	4.7k
Carin C. C. Johansson Seechurn United States	11	3.7k 0.8×	764 0.9×	233 0.7×	393 2.2×	63 0.6×	12	3.9k
Paula Ruiz‐Castillo United States	4	2.3k 0.5×	594 0.7×	291 0.9×	227 1.3×	66 0.6×	5	2.6k
Fumitoshi Shibahara Japan	28	2.2k 0.5×	706 0.8×	212 0.6×	173 1.0×	161 1.4×	55	2.4k
Yongwen Jiang China	26	3.4k 0.7×	459 0.5×	471 1.4×	241 1.4×	70 0.6×	63	3.7k
Fu‐She Han China	29	2.9k 0.6×	691 0.8×	279 0.8×	232 1.3×	46 0.4×	82	3.1k
Jaclyn M. Murphy United States	8	3.8k 0.8×	943 1.1×	260 0.8×	223 1.3×	118 1.0×	8	4.0k
Gino P. F. van Strijdonck Netherlands	25	2.0k 0.4×	826 1.0×	389 1.1×	253 1.4×	75 0.7×	46	2.3k
Jean‐François Soulé France	29	3.3k 0.7×	651 0.8×	374 1.1×	310 1.7×	107 0.9×	124	3.6k

Countries citing papers authored by Christopher J. O’Brien

Since Specialization

Citations

This map shows the geographic impact of Christopher J. O’Brien's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Christopher J. O’Brien with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Christopher J. O’Brien more than expected).

Fields of papers citing papers by Christopher J. O’Brien

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Christopher J. O’Brien. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Christopher J. O’Brien. The network helps show where Christopher J. O’Brien may publish in the future.

Co-authorship network of co-authors of Christopher J. O’Brien

This figure shows the co-authorship network connecting the top 25 collaborators of Christopher J. O’Brien. A scholar is included among the top collaborators of Christopher J. O’Brien based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Christopher J. O’Brien. Christopher J. O’Brien is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Coyle, Emma E., et al.. (2015). ChemInform Abstract: Catalytic Wittig Reactions of Semi‐ and Nonstabilized Ylides Enabled by Ylide Tuning.. ChemInform. 46(16). 1 indexed citations

Coyle, Emma E., et al.. (2014). Catalytic Wittig Reactions of Semi‐ and Nonstabilized Ylides Enabled by Ylide Tuning. Angewandte Chemie International Edition. 53(47). 12907–12911. 115 indexed citations

O’Brien, Christopher J., et al.. (2013). Breaking the Ring through a Room Temperature Catalytic Wittig Reaction. Chemistry - A European Journal. 19(19). 5854–5858. 108 indexed citations

O’Brien, Christopher J., et al.. (2013). Part I: The Development of the Catalytic Wittig Reaction. Chemistry - A European Journal. 19(45). 15281–15289. 92 indexed citations

Hadei, Niloufar, George T. Achonduh, Cory Valente, Christopher J. O’Brien, & Michael G. Organ. (2011). Differentiating CBr and CCl Bond Activation by Using Solvent Polarity: Applications to Orthogonal Alkyl–Alkyl Negishi Reactions. Angewandte Chemie International Edition. 50(17). 3896–3899. 60 indexed citations

Achonduh, George T., Niloufar Hadei, Cory Valente, et al.. (2010). On the role of additives in alkyl–alkyl Negishi cross-couplings. Chemical Communications. 46(23). 4109–4109. 105 indexed citations

Achonduh, George T., et al.. (2010). Structure–Activity Relationship Analysis of Pd–PEPPSI Complexes in Cross‐Couplings: A Close Inspection of the Catalytic Cycle and the Precatalyst Activation Model. Chemistry - A European Journal. 16(35). 10844–10853. 229 indexed citations

Chass, Gregory A., Christopher J. O’Brien, Niloufar Hadei, et al.. (2009). Density Functional Theory Investigation of the Alkyl–Alkyl Negishi Cross‐Coupling Reaction Catalyzed by N‐Heterocyclic Carbene (NHC)–Pd Complexes. Chemistry - A European Journal. 15(17). 4281–4288. 85 indexed citations

O’Brien, Christopher J., et al.. (2009). Recycling the Waste: The Development of a Catalytic Wittig Reaction. Angewandte Chemie International Edition. 48(37). 6836–6839. 253 indexed citations

10.

Valente, Cory, et al.. (2008). ChemInform Abstract: High Yielding Alkylations of Unactivated sp³ and sp² Centers with Alkyl‐9‐BBN Reagents Using an NHC‐Based Catalyst: Pd‐PEPPSI‐IPr.. ChemInform. 39(25). 1 indexed citations

11.

Organ, Michael G., Stephanie Avola, Igor Dubovyk, et al.. (2008). Pd‐Catalyzed Aryl Amination Mediated by Well Defined, N‐Heterocyclic Carbene (NHC)–Pd Precatalysts, PEPPSI. Chemistry - A European Journal. 14(8). 2443–2452. 202 indexed citations

12.

Baker, Thomas, et al.. (2008). Synthesis and Reactions of the Pestalotiopsin Skeleton. Angewandte Chemie International Edition. 47(30). 5631–5633. 40 indexed citations

13.

Valente, Cory, et al.. (2007). High yielding alkylations of unactivated sp³and sp²centres with alkyl-9-BBN reagents using an NHC-based catalyst: Pd-PEPPSI-IPr. Chemical Communications. 735–737. 90 indexed citations

14.

Kantchev, Eric Assen B., Christopher J. O’Brien, & Michael G. Organ. (2007). Palladium Complexes of N‐Heterocyclic Carbenes as Catalysts for Cross‐Coupling Reactions—A Synthetic Chemist's Perspective. Angewandte Chemie International Edition. 46(16). 2768–2813. 1500 indexed citations breakdown →

15.

Kantchev, Eric Assen B., Christopher J. O’Brien, & Michael G. Organ. (2007). Aus der Sicht des Synthetikers: Palladiumkomplexe N‐heterocyclischer Carbene als Katalysatoren für Kreuzkupplungen. Angewandte Chemie. 119(16). 2824–2870. 341 indexed citations

16.

Kantchev, Eric Assen B., Christopher J. O’Brien, & Michael G. Organ. (2007). Palladium Complexes of N‐Heterocyclic Carbenes as Catalysts for Cross‐Coupling Reactions — A Synthetic Chemist′s Perspective. ChemInform. 38(28). 4 indexed citations

17.

Organ, Michael G., Stephanie Avola, Igor Dubovyk, et al.. (2006). A User‐Friendly, All‐Purpose Pd–NHC (NHC=N‐Heterocyclic Carbene) Precatalyst for the Negishi Reaction: A Step Towards a Universal Cross‐Coupling Catalyst. Chemistry - A European Journal. 12(18). 4749–4755. 400 indexed citations

18.

Organ, Michael G., et al.. (2006). Biaryls Made Easy: PEPPSI and the Kumada–Tamao–Corriu Reaction. Chemistry - A European Journal. 13(1). 150–157. 215 indexed citations

19.

O’Brien, Christopher J., Eric Assen B. Kantchev, Cory Valente, et al.. (2006). Easily Prepared Air‐ and Moisture‐Stable Pd–NHC (NHC=N‐Heterocyclic Carbene) Complexes: A Reliable, User‐Friendly, Highly Active Palladium Precatalyst for the Suzuki–Miyaura Reaction. Chemistry - A European Journal. 12(18). 4743–4748. 727 indexed citations breakdown →

20.

Organ, Michael G., Stephanie Avola, Igor Dubovyk, et al.. (2006). A User‐Friendly, All‐Purpose Pd‐NHC (NHC: N‐Heterocyclic Carbene) Precatalyst for the Negishi Reaction: A Step Towards a Universal Cross‐Coupling Catalyst.. ChemInform. 37(43).

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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