Karl S. Hagen

Associate Professor, Inorganic Chemistry

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Harvard ANU, Australia UC, Berkeley Emory Collaborations

65.             Dunbar, K. R.; Longridge, J. J.; Rawson, J. M.; Sun, J.-S.; Hagen, K. S.; Do, B. "Useful reagents and ligands. Salts of binuclear iron(II) and iron(III) dianions [(Fe2Cl6)2- and (Fe2OCl6)2-]". Inorganic Syntheses 2002, 33, 103-107.


64.             Heidi Börzel, Peter Comba, Karl S. Hagen, Yaroslaw D. Lampeka, Achim Lienke, Gerald Linti, Michael Merz, Hans Pritzkow and Ludmilla V. Tsymbal "Iron coordination chemistry with tetra-, penta- and hexadentate bispidine-type ligands" Inorg. Chim. Acta. 2002, 337, 407-419.  Special issue dedicated to Karl Wieghardt on his 60th birthday


63.             Heidi Börzel, Peter Comba, Karl S. Hagen, Hans Pritzkow, Markus Schatz, Siegfried Schindler, and Olaf Walterd "The stabilization of dicopper(II) peroxo compounds by bispidine-type ligands" Inorg. Chem. 2002, 41, 5440-5452.


62.             Scott Childs and Karl S. Hagen "A Co-crystal Containing Kemp's Tri-acid and Acetic Acid: A 0D Aggregate Disrupts A Thermodynamically Preferred 1D Rod Motif"  Cryst. Eng. Comm. 2002, 4, 265 - 270


61.                    Sarah E. McMullen and Karl S. Hagen, "(m-Peroxo)-bis(acetonitrile-bis(ethylelediamine)-cobalt(III)) tetratriflate" Acta Cryst., 2002, E58,  m141-m143.


60.             Sarah E. McMullen and Karl S. Hagen, "trans-bis(Benzoato)tetrakis(methanol)iron(II): Ligand Bulk is not Determining" Acta Cryst., 2002, C58,  m48-m49.


59.             K. N. Jayaprakash, Debasis Hazra, Karl S. Hagen, Uttamkumar Samanta, Mohan M. Bhadbhade, Vedavati G. Puranik, Amitabha Sarkar "Solution and solid state sonformation of Fischer carbene complexes vis-à-vis conformation of aryl carboxamides: complexation of the aromatic ring by tricarbonylchromium makes a difference" J. Organomet. Chem., 2001, 618, 709-722.


58.             Karl S. Hagen "Iron(II) Triflate Salts as Convenient Substitutes for Perchlorate Salts: Crystal Structures of [Fe(H2O)6](CF3SO3)2 and Fe(MeCN)4(CF3SO3)2 Inorg. Chem. 2000, 39, 5867-5869. Web Release Date November 17, 2000.


57.             Alain Diebold, Abdelaziz Elbouadili, and Karl S. Hagen "Crystal Structures and Solution Behavior of Paramagnetic Divalent Transition Metal Complexes (Fe, Co) of the Sterically Encumbered Tridentate Macrocycles 1,4,7-R3-1,4,7-triazacyclononane: Coordination Number Five (R = i-Pr) and Six (R = i-Bu)" Web release date: August 3, 2000. Inorg. Chem. 2000, 39, 3915-3923.


56.             Sonha C. Payne and Karl S. Hagen "Steric Control of Reactivity of Non-Heme µ-Hydroxo Diiron(II) Model Complexes with Oxygen: Isolation of a Strongly Coupled µ-Oxo Fe(II)Fe(III) Dimer" J. Am. Chem. Soc. 2000, 122, 6399-6410. Web release date: June 23, 2000.


55.             David W. Blakesley, Sonha C. Payne, and Karl S. Hagen "Spin State Variation in Solid State and Solution of Mononuclear Iron(II) 1,4,7-Trimethyl-1,4,7-Triazacyclonane Complexes". Inorg. Chem. 2000, 39 (9); 1979-1989. Web release date: April 13, 2000


54.             Sheyi Wang, Michael S. Wemple, Jae Yoo, Kirsten Folting, John C. Huffman, Karl S. Hagen, David N. Hendrickson,* and George Christou* "Tetranuclear Manganese Carboxylate Complexes with a Trigonal Pyramidal Metal Topology via Controlled Potential Electrolysis" Inorg. Chem. 2000, 39, 1501-1513. Web Release Date: 3/14/2000


53.             Heidi Börzel, Peter Comba, Karl S. Hagen, Charis Katsichtis, and Hans Pritzkow  "A copper(I) oxygenation precursor in the entatic state: Two isomers of a copper(I) compound of a rigid tetradentate ligand" Chem. Eur. J. 2000, 6, 914-919.

                  This full paper is a result of a collaboration with Peter Comba where one of his students (Heidi) spent 10 weeks in my lab learning how to synthesize and characterize air sensitive compounds.


52.             Alain Diebold and Karl S. Hagen  "Iron(II) Polyamine Chemistry: Variation of Spin State and Coordination Number in Solid State and Solution with Iron(II) Tris(2-pyridylmethyl)amine Complexes." Inorg. Chem.  1998, 37, 215-223.


51.             Rene Lachicotte, Karl S. Hagen  "Synthesis and Structures of Trinuclear and µ-Hydroxo Pentanuclear Iron(II) Carboxylates as Models of Reduced Ferritin and White Rust." Inorg. Chim. Acta  1997, 263,407-414. Special issue dedicated to Prof. Richard H. Holm on his 60th birthday


50.             Daniel J. Williams, Donald Vanderveer, Brian R. Crouse, Rhonda R. Raye, Ted Carter, Karl S. Hagen and Meggan Brewer "Spectroscopic Properties and Molecular Structure of 1,3-Dimethyl-2-(Se, Se-dibromoseleno)-2(3H)-imidazolylidene." Main Group Chemistry, 1997, 2, 61-66.


49.             Jonathan D. Cohen, Sonha Payne, Karl S. Hagen, and Joann Sanders‑Loehr "Resonance Raman Evidence for a Trapped-Valence State in an Iron(II)/Iron(III) Complex Formed from an Outer-Sphere Reaction Between a Diiron(II) Complex and Oxygen."  J. Am. Chem. Soc. 1997, 119, 2960-2961.


48.             Scott L. Childs and Karl S. Hagen "The Inorganic Illustrator: a 3-D Graphical Supplement for Inorganic and Bioinorganic Chemistry Courses Distributed on CD-ROM" J. Chem. Ed. 1996, 73, 917-918.


47.             M. W. Wemple, D. M. Adams, K. S. Hagen, K. Folting, D. N. Hendrickson, and G. Christou "Site-Specific Ligand Variation in Manganese-Oxide Cubane Complexes, and Unusual Magnetic Relaxation Effects in [Mn4O3X(OAc)3(dbm)3] (X = N3-, OCN-) J. Chem. Soc., Chem. Commun. 1995, 1591-1593.


46.             D. M. Collard, M. J. Sadri, D. VanDerveer, K. S. Hagen "Highly Twisted Substituted Arenes - X-ray Structure and Dynamic H-1-NMR Spectra of 1,4-Dialkyl-2,3,5,6-Tetrakis(alkylsulfonyl)benzenes." J. Chem. Soc., Chem. Commun. 1995, 1357-1358.


45.             C. R. Randall, L. Shu, Y.-M. Chiou, K. S. Hagen, M. Ito, N. Kitajima, R. J. Lachicotte, Y. Zang, L. Que, Jr. "X-ray Absorption Pre-Edge Studies of High-Spin Iron(II) Complexes" Inorg. Chem. 1995, 34, 1036-1039.


44.             S. Wang, H-L. Tsai, K. S. Hagen, D. N. Hendrickson, G. Christou "New Structural Type in Manganese Carboxylate Chemistry via Coupled Oxidation/Oxide Incorporation: Potential Insights into Photosynthetic Water Oxidation" J. Am. Chem. Soc.  1994, 116, 8376-8377.


43.             Gerald A. Bottemley, Ian J. Clarke, Inge I. Creaser, Lutz M. Engelhardt, Rodney J. Gueu, Karl S. Hagen, Jack M. Harrowfield, Geoffrey  A. Lawrance, Peter A. Lay, Alan M. Sargeson, Andrew J. See, Brian W. Skelton, Allan H. White, and Faye R. Wilner "The Synthesis and Structure of Encapsulating Ligands: Properties of Bicyclic Hexaamines."  Aust. J. Chem. 1994, 47, 143-179


42.             Karl S. Hagen and Vinod S. Nair, "Iron Oxo Aggregates:  Synthesis and Structure of the Octanuclear Hexacation, [Fe8O5(OAc)8(tren)4]6+, Containing a Square-Planar Oxide Bridge." Inorg. Chem. 1994, 33, 185-186.


41.             Karl S. Hagen, Rene Lachicotte, and Alex Kitaygorodskiy "Supramolecular Control of Stepwise and Selective Ligand Substitution of Terminal Carboxylates in Aqua-Carboxylato Bridged Dimetal(II) Model Complexes of Reduced Non-Heme Iron Proteins."   J. Am. Chem. Soc. 1993, 115, 12617-12618.


40.             A. Nanthakumar, S. Fox, S. M. Nasir, N. Ravi, B. H. Huynh, R. D. Orosz, E. P. Day, K. S. Hagen, and K. D. Karlin, "Dioxygen Reactivity Models for Cytochrome C Oxidase: Synthesis and Characterization of Oxo and Hydroxo-Bridged Porphyrin-Iron/Copper Dinuclear Complexes" in "The Activation of Dioxygen and Homogeneous Catalytic Oxidation"  D. H. R. Barton, Ed. Plenum Press, N. Y. 1993. pp 381-394.


39.             Lanny S. Liebeskind, Marvin S. Yu, Richard H. Yu, Jianying Wang, and Karl S. Hagen "4,4'-Bicyclobutene-1,2-diones: Bisquaryls" J. Am. Chem. Soc. 1993, 115, 9048-9055.


38.             Rene Lachicotte, Alex Kitygorodskiy, and Karl S. Hagen "Distinguishing Hydroxy from Aqua Bridges in Paramagnetic Diiron(II) and Dicobalt(II) Models of Reduced Dinuclear Non-Heme Iron Sites in Proteins by 1H, 2H, and 19F NMR and H/D Isotopic Exchange". J. Am. Chem. Soc. 1993, 115, 8883-8884.


37.             A. Nanthakumar, S. Fox, N. N. Murthy, K. D. Karlin, N. Ravi, B. H. Huynh, R. D. Orosz, E. P. Day, K. S. Hagen, and N. J. Blackburn "Oxo and Hydroxo-Bridged (Porphyrin)Iron(III)-Copper(II) Species as Cytochrome C Oxidase Models: Acid-Base Interconversions and X-ray Structure of the Fe(III)-(O2-)-Cu(II) Complex"  J. Am. Chem. Soc. 1993, 115, 8513-8514.


36.             Karl S. Hagen, Rene Lachicotte, Alex  Kitaygorodskiy  and Abdelaziz Elbouadili, "Molecular Recognition Within a Rigid Host: Structural Changes Induced in µ-Carboxylato Dimetal(II) Complexes by Replacing Steric Repulsions with Hydrogen Bonding." Angew. Chem.. Int. Ed. Engl. 1993, 32, 1321-1324.


35.             Dong Hou, Gyu-Shik Kim, Karl S. Hagen, and Craig L. Hill "Synthesis and Structural Characterization of an Organic Soluble Polyester of a Polyvanadate of [(n-C4H9)4N][V6O12(OCH3)7]." Inorg. Chim. Acta  1993, 211, 127-130.


34.             Dong Hou, Karl S. Hagen, and Craig L. Hill "Pentadecavanadate, [V15O42]9-, a New Highly-copndensed Fully-oxidized Isopolyvanadate with Kinetic Stability in Water." J. C. S. Chem. Commun.  1993, 426-428.


33.             Gyu-Shik Kim, Karl S. Hagen, and Craig Hill "Synthesis, Structure, Spectroscopic Properties, and Hydrolytic Chemistry of Water and Organic Solvent Soluble Anti-HIV-Active Organophosphonyl Polyoxotungstates of Formula [C6H5P(O)]2Xn+W11O39(8-n)- (where Xn+ = P5+, Si4+)." Inorg. Chem. 1992, 31, 5316-5324.


32.             Karl S. Hagen and Rene Lachicotte, "Diiron(II) m-Aqua Bis(m-Carboxalato) Models of Reduced Dinuclear Non-Heme Iron Sites in Proteins."  J. Am. Chem. Soc.  1992, 114, 8741-8742.


31.             Vinod S. Nair and Karl S. Hagen, "Iron Oxo Aggregation: Fe3 to Fe6.  Synthesis, Structure and Magnetic Properties of the Hexanuclear Dication, [Fe6(m4-O)2(m2-OMe)8(OMe)4(tren)2]2+, a Soluble, Crystalline Model of Iron Oxo-Hydroxo Nanoparticles, the Core of Ferritin and Rust Formation."   Inorg. Chem. 1992, 31, 4048-4050.


30.             Karl S. Hagen, "Synthetic Models for Iron Oxo Aggregation and Biomineralization". Angew. Chem. Int. Ed. Engl. 1992, 31, 1010-1012, German version Angew. Chem. 1992, 104, 1036.


29.             Karl S. Hagen  "Transition Metal in a Cube.  A Discrete Eight Coordinate Mn(II) [2.2.2] Cryptate as a Body-Centered Cube with an N2O6 Donor Set." Angew. Chem. Int. Ed. Engl. 1992, 31, 764-766.


28.             Dong Hou, Karl S. Hagen, and Craig L. Hill "Tridecavanadate, [V13O34]3-, a New High Potential Isopolyvanadate." J. Am. Chem. Soc. 1992, 114, 5864-5866.


27.             Alessandra Gerli, Karl S. Hagen and Luigi G. Marzilli, "The Nuclearity and Formulation of SALPN Complexes Formed from M(O2CCH3)2: Resolution of Longstanding Problems by X-ray Crystallography." Inorg. Chem. 1991, 30, 4673-4676.


26.             F. M. Menger, Jeng-Jong Lee, and K. S. Hagen, "Molecular Laminates.  Three Distinct Crystal Packing Modes."  J. Am. Chem. Soc. 1991, 113, 4017-4019.


25.             F.-J. Wu, D. M. Kurtz, Jr., K. S. Hagen, P. D. Nyman, P. G. Debrunner, and V. A. Vankai "m-Oxo/hydroxobis(m-carboxylato)idiiron(III) and Dimanganese(III) Complexes with Capping Tris(imidazol-2-yl)phosphine Ligands." Inorg. Chem. 1990, 29, 5174-5183.