scholarly journals First- and second-sphere contributions to Fe(ii) site activation by cosubstrate binding in non-heme Fe enzymes

2014 ◽  
Vol 43 (4) ◽  
pp. 1505-1508 ◽  
Author(s):  
Kenneth M. Light ◽  
John A. Hangasky ◽  
Michael J. Knapp ◽  
Edward I. Solomon
Keyword(s):  
Coordinative Unsaturation

Factors that lead to coordinative unsaturation in non-heme-Fe(ii) enzymes include sterics, facial triad carboxylate H-bonding, and strong cosubstrate donor ligation.

scholarly journals Geometrical flexibility of platinum nanoclusters: impacts on catalytic decomposition of ethylene glycol

2017 ◽  
Vol 19 (42) ◽  
pp. 28596-28603 ◽  
Author(s):  
Mehdi Mahmoodinia ◽  
Thuat T. Trinh ◽  
Per-Olof Åstrand ◽  
Khanh-Quang Tran
Keyword(s):  
Hydrogen Production ◽  
Ethylene Glycol ◽  
Catalytic Decomposition ◽  
Structural Flexibility ◽  
Biomass Materials ◽  
Coordinative Unsaturation ◽  
Platinum Nanoclusters

The structural flexibility and the coordinative unsaturation of Pt13clusters make them a better catalyst than a Pt surface for hydrogen production from biomass materials.

Modulation of coordinative unsaturation degree and valence state for cerium-based adsorbent to boost phosphate adsorption

2020 ◽  
Vol 394 ◽  
pp. 124912
Author(s):  
Jiaojie He ◽  
Yuhong Xu ◽  
Penghui Shao ◽  
Liwei Yang ◽  
Yan Sun ◽  
...  
Keyword(s):  
Valence State ◽  
Phosphate Adsorption ◽  
Coordinative Unsaturation

Probing the Coordinative Unsaturation and Local Environment of Ti3+ Sites in an Activated High-Yield Ziegler-Natta Catalyst

2015 ◽  
Vol 54 (16) ◽  
pp. 4857-4860 ◽  
Author(s):  
Elena Morra ◽  
Elio Giamello ◽  
Sabine Van Doorslaer ◽  
Giuseppe Antinucci ◽  
Maddalena D'Amore ◽  
...  
Keyword(s):  
Local Environment ◽  
High Yield ◽  
Natta Catalyst ◽  
Coordinative Unsaturation ◽  
Ziegler Natta Catalyst

Synthesis and characterization of an homologous series of bis(amido)diazadipnictetidines (Pnict = P, As, Sb, Bi)

2001 ◽  
Vol 79 (3) ◽  
pp. 342-348 ◽  
Author(s):  
Neil Burford ◽  
T Stanley Cameron ◽  
Kim-Chung Lam ◽  
Daren J LeBlanc ◽  
Charles LB Macdonald ◽  
...  
Keyword(s):  
Key Words ◽  
General Formula ◽  
Homologous Series ◽  
Spectroscopic Characterization ◽  
Structural Features ◽  
Synthesis And Characterization ◽  
General Reaction ◽  
Coordinative Unsaturation

Spectroscopic and structural features are presented for the first homologous series of diazadipnictetidines, which have the general formula [DipNPnN(H)Dip]2 (Pn = P, As, Sb, Bi; Dip = 2,6-diisopropylphenyl). The compounds are obtained from a general reaction of the corresponding halopnictine with excess LiN(H)Dip, which was previously reported for [DipNBiN(H)Dip]2. However, isolation is improved by the introduction of LiN(H)-t-Bu (at the appropriate stoichiometry) following the addition of LiN(H)Dip. The intermediate steric presence of the Dip substituent is suitable to support the heterocatenate framework for all homologues. This is in contrast to the small substituents (e.g. alkyl), which enable both bis- and tris-amination, and the larger substituent (Mes* = tri-tert-butylphenyl), which can impose coordinative unsaturation (aminoiminopnictine) for the smaller congeners (P and As).Key words: phosphorus, arsenic, antimony, bismuth, phosphazanes, phosphetidines, synthesis, structures, spectroscopic characterization.

Sign in / Sign up

Export Citation Format

Share Document