Theoretical predictions of a highly reactive non-heme Fe(IV)=O complex with a high-spin ground state.

نویسندگان

  • Kyung-Bin Cho
  • Sason Shaik
  • Wonwoo Nam
چکیده

Computations show that a non-heme iron(iv)-oxo complex with a trigonal bipyramidal structure, [(Me(6)TREN)Fe(IV)=O](2+), has a quintet ground state and a low activation barrier for H-abstraction from cyclohexane, whereas its ruthenium analogue, [(Me(6)TREN)Ru(IV)=O](2+), has a triplet ground state and a high H-abstraction barrier.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Mononuclear Non-Heme Fe(IV)=O Systems: Electronic Structures and Comparison to Heme and Copper Species

Mononuclear non-heme iron enzymes catalyze a variety of biological reactions requiring the binding and activation of dioxygen. Using spectroscopic methods and density functional calculations, the geometric and electronic structures of the oxygen intermediates and their reactivities are being defined to understand the catalytic mechanisms on a molecular level. A key intermediate is the Fe(IV)=O ...

متن کامل

Prediction of high-valent iron K-edge absorption spectra by time-dependent density functional theory.

In recent years, a number of high-valent iron intermediates have been identified as reactive species in iron-containing metalloproteins. Inspired by the interest in these highly reactive species, chemists have synthesized Fe(IV) and Fe(V) model complexes with terminal oxo or nitrido groups, as well as a rare example of an Fe(VI)-nitrido species. In all these cases, X-ray absorption spectroscopy...

متن کامل

Accelerated Computational Analysis of Metal−Organic Frameworks for Oxidation Catalysis

High-spin iron(IV)−oxo compounds are known to activate strong C−H bonds. Stabilizing the high-spin S = 2 electronic configuration is difficult in molecular species for homogeneous catalysis, but recent experimental and computational results suggest this can be achieved in the metal−organic framework Fe2(dobdc) (dobdc 4− = 2,5-dioxido-1,4-benzenedicarboxylate) and its magnesium-diluted analogues...

متن کامل

Direct visualization of a Fe(IV)–OH intermediate in a heme enzyme

Catalytic heme enzymes carry out a wide range of oxidations in biology. They have in common a mechanism that requires formation of highly oxidized ferryl intermediates. It is these ferryl intermediates that provide the catalytic engine to drive the biological activity. Unravelling the nature of the ferryl species is of fundamental and widespread importance. The essential question is whether the...

متن کامل

Dioxygen Activation by a Non-Heme Iron(II) Complex: Theoretical Study toward Understanding Ferric-Superoxo Complexes.

We present a systematic study using density functional theory (DFT) and coupled cluster (CCSD(T)) computations with an aim of characterizing a non-heme ferric-superoxo complex [(TMC)Fe(O2)](2+) (TMC = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane) that was proposed to perform allylic C-H activation of cyclohexene (Lee, Y.-M. et al. J. Am. Chem. Soc.2010, 132, 10668). As such, we invest...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Chemical communications

دوره 46 25  شماره 

صفحات  -

تاریخ انتشار 2010