Emeritus Professor – Inorganic & Polymer Chemistry

Dr. Allen came to Vermont in 1967 after receiving his Ph.D. from the University of Illinois, where he studied with Therald Moeller. He has been a Senior Visitor at Oxford and Edinburgh and a consultant to several corporations. He is on the editorial boards of the Journal of Inorganic and Organometallic Polymers and Phosphorus Sulfur Silicon and Related Elements. He was selected as the University Scholar in the Physical Sciences in 1982-83, received the George V. Kidder Outstanding Faculty Award in 1986, was named a Mass High Tech "Allstar" in 2000, received the Dean's lecture award from the College of Arts and Sciences and the Luther F. Hackett award from the Vermont Technology Council for contributions to economic development in Vermont in 2005. He was elected to the Vermont Academy of Science and Engineering in 2005, served as President of that organization and developed a STEM outreach program for K-12 students.

Research and/or Creative Works

The research program in Dr. Allen's group was devoted to the study of inorganic rings and polymers. The inorganic ring chemistry presents interesting questions of electronic structure, reactivity and mechanism. Additionally, these ring systems may be transformed into hybrid inorganic-organic polymers which are new classes of materials with interesting properties having applications such as flame retardency, polymeric electron transfer or as membranes. The research interests of the student allowed for training in inorganic chemistry, polymer chemistry or a combination of the two.


S. Besli, C.M. Balci, S. Dogan, C.W.Allen “Regiochemical Control in the Substitution Reactions of Cyclotriphosphazene Derivatives with Secondary Amines”, Inorg. Chem., 2019, 57, 12066.
C.M.Balci,S.Besli,Y.Fatma, C.W.Allen “Observation of an alternate pathway in the   deprotonation of an isobutylaminocyclotetraphosphazene”   Inorganic Chemistry Communications, 2018, 92, 84.  

S. Beşli, C.M. Balci, A. Uslu, C.W.Allen "A New Synthetic Approach to Molecular  Rods Using Cyclophosphazene Based-Oligospiranes", Inorg. Chem., 2017,  56,  9413.

A. Elayan, C.W.Allen and E.S.Peterson "Synthesis of Poly(dichlorophosphazene) by the Melt Phase Polymerization of P-Trichloro-N-(dichlorophosphoryl)monophosphazenes", J. Inorg. Organomet. Polym. Mater., 2017, 27(S1), 119

S. Besli, C.Mutlu, H.Canturk, S.Dogan, F.Yuksel and C.W.Allen ”Unexpected Ring Expansion of a Four-Membered Cyclophosphazane” Inorg. Chem., 2016, 55, 7832.

R. Hayes and C.W. Allen ”The Mechanism of a Phosphazene-Phosphazane Rearrangement” Dalton Trans., 2016, 45, 2060.

M. Calichman and C.W.Allen “Organophosphazenes 28: The Nature of the Exocyclic  Phosphorus-Carbon Bond in Organophosphazenes” Phosphorus, Sulfur, Silicon and Related Elements, 2015, 190, 2110.

D.Kumar, N. Singh, A.J.Elias, P. Malik and C.W. Allen, “Reactions of Alkyne and Butadiyne
   Derived Fluorinated Cyclophosphazenes with Diiron and Dimolybdenum Carbonyls”, Inorg. Chem., 2014, 53, 10674.

J.C.Shaw and C.W.Allen,”Organophosphazenes. 27: The Synthesis and Polymerization of (4-ethenylphenyl)pentafluorocyclotriphosphazene”, Phosphorus, Sulfur, Silicon and Related Elements, 2014, 189, 1(2014).

L.Cong and C.W.Allen, “4-Ethynylphenylato Cyclo- and Poly(phosphazenes) and their reactions with Dicobalt Octacarbonyl”, J. Inorg. Organomet. Polym. Mater., 2014, 24, 173(2014).

K.R.Carter and C.W.Allen, “ Approaches to Mixed Substituent Poly[(vinyloxy)cyclophosphazenes]”, J. Polym. Sci., Part A:Polym. Chem., 2013, 51, 2288.

M.Bahadur and C.W.Allen,”Organophosphazenes.26.Factors Controlling the Pathways Observed in the Reactions of Ethynyl Lithium Reagents with  Hexafluorocyclotriphosphazene”, Inorg. Chem., 2012, 51, 5465.


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