Christopher J. O’Brien

5.6k citations

34 papers · 5.0k indexed · 2 hit papers · h-index 23

Co-authors: Michael G. Organ Eric Assen B. Kantchev Niloufar Hadei Cory Valente Gregory A. Chass Stephanie Avola Alan J. Lough Alan C. Hopkinson
Topics: Catalytic Cross-Coupling Reactions (20 papers)N-Heterocyclic Carbenes in Organic and Inorganic Chemistry (16 papers)Synthetic Organic Chemistry Methods (12 papers)
Cited by: Organic Chemistry Inorganic Chemistry Process Chemistry and Technology
Journals: Angewandte Chemie International Edition Chemical Communications Nature Chemistry
Partner nations: Canada United Kingdom United States

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

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

#	Work	Indexed citations
1	ChemInform Abstract: Catalytic Wittig Reactions of Semi‐ and Nonstabilized Ylides Enabled by Ylide Tuning. 2015 ·ChemInform ·Emma E. Coyle,(unknown),(unknown),(unknown),Florie Lavigne,Elizabeth H. Krenske,Christopher J. O’Brien	1
2	Catalytic Wittig Reactions of Semi‐ and Nonstabilized Ylides Enabled by Ylide Tuning 2014 ·Angewandte Chemie International Edition ·Emma E. Coyle,(unknown),(unknown),(unknown),Florie Lavigne,Elizabeth H. Krenske,Christopher J. O’Brien	115
3	Breaking the Ring through a Room Temperature Catalytic Wittig Reaction 2013 ·Chemistry - A European Journal ·Christopher J. O’Brien,Florie Lavigne,Emma E. Coyle,(unknown),(unknown)	108
4	Part I: The Development of the Catalytic Wittig Reaction 2013 ·Chemistry - A European Journal ·Christopher J. O’Brien,(unknown),(unknown),(unknown),Jennifer L. Tellez,(unknown),Emma E. Coyle,Florie Lavigne,Lauren J. Kang,(unknown)	92
5	Differentiating CBr and CCl Bond Activation by Using Solvent Polarity: Applications to Orthogonal Alkyl–Alkyl Negishi Reactions 2011 ·Angewandte Chemie International Edition ·Niloufar Hadei,George T. Achonduh,Cory Valente,Christopher J. O’Brien,Michael G. Organ	60
6	On the role of additives in alkyl–alkyl Negishi cross-couplings 2010 ·Chemical Communications ·George T. Achonduh,Niloufar Hadei,Cory Valente,Stephanie Avola,Christopher J. O’Brien,Michael G. Organ	105
7	Structure–Activity Relationship Analysis of Pd–PEPPSI Complexes in Cross‐Couplings: A Close Inspection of the Catalytic Cycle and the Precatalyst Activation Model 2010 ·Chemistry - A European Journal ·(unknown),(unknown),George T. Achonduh,Eric Assen B. Kantchev,Christopher J. O’Brien,Alan J. Lough,Michael G. Organ	229
8	Density Functional Theory Investigation of the Alkyl–Alkyl Negishi Cross‐Coupling Reaction Catalyzed by N‐Heterocyclic Carbene (NHC)–Pd Complexes 2009 ·Chemistry - A European Journal ·Gregory A. Chass,Christopher J. O’Brien,Niloufar Hadei,Eric Assen B. Kantchev,Wei‐Hua Mu,De‐Cai Fang,Alan C. Hopkinson,Imre G. Csizmadia,Michael G. Organ	85
9	Recycling the Waste: The Development of a Catalytic Wittig Reaction 2009 ·Angewandte Chemie International Edition ·Christopher J. O’Brien,Jennifer L. Tellez,(unknown),Lauren J. Kang,(unknown),(unknown),(unknown),Gregory A. Chass	253
10	ChemInform Abstract: High Yielding Alkylations of Unactivated sp³ and sp² Centers with Alkyl‐9‐BBN Reagents Using an NHC‐Based Catalyst: Pd‐PEPPSI‐IPr. 2008 ·ChemInform ·Cory Valente,(unknown),David A. Candito,Christopher J. O’Brien,Michael G. Organ	1
11	Pd‐Catalyzed Aryl Amination Mediated by Well Defined, N‐Heterocyclic Carbene (NHC)–Pd Precatalysts, PEPPSI 2008 ·Chemistry - A European Journal ·Michael G. Organ,(unknown),Stephanie Avola,Igor Dubovyk,Niloufar Hadei,Eric Assen B. Kantchev,Christopher J. O’Brien,Mahmoud Sayah,Cory Valente	202
12	Synthesis and Reactions of the Pestalotiopsin Skeleton 2008 ·Angewandte Chemie International Edition ·Thomas Baker,David J. Edmonds,(unknown),Christopher J. O’Brien,David J. Procter	40
13	High yielding alkylations of unactivated sp³and sp²centres with alkyl-9-BBN reagents using an NHC-based catalyst: Pd-PEPPSI-IPr 2007 ·Chemical Communications ·Cory Valente,(unknown),David A. Candito,Christopher J. O’Brien,Michael G. Organ	90
14	Palladium Complexes of N‐Heterocyclic Carbenes as Catalysts for Cross‐Coupling Reactions—A Synthetic Chemist's Perspectivebreakdown → 2007 ·Angewandte Chemie International Edition ·Eric Assen B. Kantchev,Christopher J. O’Brien,Michael G. Organ	1500
15	Aus der Sicht des Synthetikers: Palladiumkomplexe N‐heterocyclischer Carbene als Katalysatoren für Kreuzkupplungen 2007 ·Angewandte Chemie ·Eric Assen B. Kantchev,Christopher J. O’Brien,Michael G. Organ	341
16	Palladium Complexes of N‐Heterocyclic Carbenes as Catalysts for Cross‐Coupling Reactions — A Synthetic Chemist′s Perspective 2007 ·ChemInform ·Eric Assen B. Kantchev,Christopher J. O’Brien,Michael G. Organ	4
17	A User‐Friendly, All‐Purpose Pd–NHC (NHC=N‐Heterocyclic Carbene) Precatalyst for the Negishi Reaction: A Step Towards a Universal Cross‐Coupling Catalyst 2006 ·Chemistry - A European Journal ·Michael G. Organ,Stephanie Avola,Igor Dubovyk,Niloufar Hadei,Eric Assen B. Kantchev,Christopher J. O’Brien,Cory Valente	400
18	Biaryls Made Easy: PEPPSI and the Kumada–Tamao–Corriu Reaction 2006 ·Chemistry - A European Journal ·Michael G. Organ,(unknown),Stephanie Avola,Niloufar Hadei,(unknown),Christopher J. O’Brien,Cory Valente	215
19	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 Reactionbreakdown → 2006 ·Chemistry - A European Journal ·Christopher J. O’Brien,Eric Assen B. Kantchev,Cory Valente,Niloufar Hadei,Gregory A. Chass,Alan J. Lough,Alan C. Hopkinson,Michael G. Organ	727
20	A User‐Friendly, All‐Purpose Pd‐NHC (NHC: N‐Heterocyclic Carbene) Precatalyst for the Negishi Reaction: A Step Towards a Universal Cross‐Coupling Catalyst. 2006 ·ChemInform ·Michael G. Organ,Stephanie Avola,Igor Dubovyk,Niloufar Hadei,Eric Assen B. Kantchev,Christopher J. O’Brien,Cory Valente	0

About Christopher J. O’Brien

Christopher J. O’Brien is a scholar working on Organic Chemistry, Inorganic Chemistry and Pharmacology, having authored 34 papers that have together received 5.0k indexed citations. Recurring topics across this 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). The work is most often cited by research in Organic Chemistry (4.9k citations), Inorganic Chemistry (835 citations) and Process Chemistry and Technology (113 citations). Christopher J. O’Brien has collaborated with scholars based in Canada, United Kingdom and United States. Frequent 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. Their work appears in journals such as Angewandte Chemie International Edition, Chemical Communications and Nature Chemistry.

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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