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Lewis Acid Interactions with Ruthenium Formyl and Hydroxymethyl Complexes
Lewis Acid Interactions with Ruthenium Formyl and Hydroxymethyl Complexes
Lewis Acid Interactions with Ruthenium Formyl and Hydroxymethyl Complexes

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202104806
ISBN  
9798291562055
DDC  
546
저자명  
Sirlin, Jake Tyler.
서명/저자  
Lewis Acid Interactions with Ruthenium Formyl and Hydroxymethyl Complexes
발행사항  
[Sl] : The University of North Carolina at Chapel Hill, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
582 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
주기사항  
Advisor: Dempsey, Jillian L.
학위논문주기  
Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2025.
초록/해제  
요약The global pursuit of efficient and sustainable energy sources has rekindled interest in the capacity of homogeneous, Fischer-Tropsch (FT) catalytic processes capable of reducing renewable feedstocks such as syngas to liquid fuels. While traditional, heterogeneous FT processes often require extreme conditions and with low product specificity, homogeneous FT processes would be molecularly tunable and mechanistically accessible. This work explores the role of Lewis acidic cations as additives in model FT homogeneous processes, with a focus on their capacity to stabilize and tune the reactivity of possible catalytic intermediates capable of CO reduction to methanol.Chapter 2 focuses on a model formyl complex, [Ru(bpy)2(CO)(CHO)]+ (bpy = 2,2'-bipyridine), involved in the reduction of CO to methanol using [Ru(bpy)2(CO)2]2+ and sacrificial H+/H- donors. NMR spectroscopic techniques revealed that monocationic, alkali cations such as Li+ and Na+ can adduct with [Ru(bpy)2(CO)(CHO)]+ intermediate via association to the nucleophilic formyl oxygen, leading to enhanced carbene character in the complex. The effects of this adduct association on the reactivity and stability of [Ru(bpy)2(CO)(CHO)]+ is demonstrated and explored.Chapter 3 continues the exploration of Lewis acid interactions with [Ru(bpy)2(CO)(CHO)]+, but with a stronger, dicationic [Mg(H2O)x]2+ species. Insights into adduct formation using NMR techniques involving variable temperature and titration studies reveal a 2:1 binding mechanism for the association of [Ru(bpy)2(CO)(CHO)]+ with Mg2+. The dicationic Lewis acids bridges two formyl units and imparts strong carbene character mimicking the multi-site behavior observed in heterogeneous FT processes.Chapter 4 explores the interactions of Lewis acids with reactive hydroxymethyl intermediates. The highly reduced model [Ru(bpy)2(CO)(CH2OH)]+ demonstrates similar 2:1 binding association equilibrium with Mg2+ as [Ru(bpy)2(CO)(CHO)]+. However, these adducts of [Ru(bpy)2(CO)(CH2OH)]+ with Mg2+ show clean generation of formaldehyde. This result highlights with the potential for CO reduction to formaldehyde as a potent C1 synthon and fuel precursor.
일반주제명  
Inorganic chemistry
일반주제명  
Molecular chemistry
일반주제명  
Chemistry
일반주제명  
Analytical chemistry
키워드  
Fischer-Tropsch
키워드  
Formyl
키워드  
Hydride transfer
키워드  
Hydroxymethyl
키워드  
Catalytic intermediates
기타저자  
The University of North Carolina at Chapel Hill Chemistry
기본자료저록  
Dissertations Abstracts International. 87-02B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
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■1001  ▼aSirlin,  Jake  Tyler.
■24510▼aLewis  Acid  Interactions  with  Ruthenium  Formyl  and  Hydroxymethyl  Complexes
■260    ▼a[Sl]▼bThe  University  of  North  Carolina  at  Chapel  Hill▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a582  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-02,  Section:  B.
■500    ▼aAdvisor:  Dempsey,  Jillian  L.
■5021  ▼aThesis  (Ph.D.)--The  University  of  North  Carolina  at  Chapel  Hill,  2025.
■520    ▼aThe  global  pursuit  of  efficient  and  sustainable  energy  sources  has  rekindled  interest  in  the  capacity  of  homogeneous,  Fischer-Tropsch  (FT)  catalytic  processes  capable  of  reducing  renewable  feedstocks  such  as  syngas  to  liquid  fuels.  While  traditional,  heterogeneous  FT  processes  often  require  extreme  conditions  and  with  low  product  specificity,  homogeneous  FT  processes  would  be  molecularly  tunable  and  mechanistically  accessible.  This  work  explores  the  role  of  Lewis  acidic  cations  as  additives  in  model  FT  homogeneous  processes,  with  a  focus  on  their  capacity  to  stabilize  and  tune  the  reactivity  of  possible  catalytic  intermediates  capable  of  CO  reduction  to  methanol.Chapter  2  focuses  on  a  model  formyl  complex,  [Ru(bpy)2(CO)(CHO)]+  (bpy  =  2,2'-bipyridine),  involved  in  the  reduction  of  CO  to  methanol  using  [Ru(bpy)2(CO)2]2+  and  sacrificial  H+/H-  donors.  NMR  spectroscopic  techniques  revealed  that  monocationic,  alkali  cations  such  as  Li+  and  Na+  can  adduct  with  [Ru(bpy)2(CO)(CHO)]+  intermediate  via  association  to  the  nucleophilic  formyl  oxygen,  leading  to  enhanced  carbene  character  in  the  complex.  The  effects  of  this  adduct  association  on  the  reactivity  and  stability  of  [Ru(bpy)2(CO)(CHO)]+  is  demonstrated  and  explored.Chapter  3  continues  the  exploration  of  Lewis  acid  interactions  with  [Ru(bpy)2(CO)(CHO)]+,  but  with  a  stronger,  dicationic  [Mg(H2O)x]2+  species.  Insights  into  adduct  formation  using  NMR  techniques  involving  variable  temperature  and  titration  studies  reveal  a  2:1  binding  mechanism  for  the  association  of  [Ru(bpy)2(CO)(CHO)]+  with  Mg2+.  The  dicationic  Lewis  acids  bridges  two  formyl  units  and  imparts  strong  carbene  character  mimicking  the  multi-site  behavior  observed  in  heterogeneous  FT  processes.Chapter  4  explores  the  interactions  of  Lewis  acids  with  reactive  hydroxymethyl  intermediates.  The  highly  reduced  model  [Ru(bpy)2(CO)(CH2OH)]+  demonstrates  similar  2:1  binding  association  equilibrium  with  Mg2+  as  [Ru(bpy)2(CO)(CHO)]+.  However,  these  adducts  of  [Ru(bpy)2(CO)(CH2OH)]+  with  Mg2+  show  clean  generation  of  formaldehyde.  This  result  highlights  with  the  potential  for  CO  reduction  to  formaldehyde  as  a  potent  C1  synthon  and  fuel  precursor.
■590    ▼aSchool  code:  0153.
■650  4▼aInorganic  chemistry
■650  4▼aMolecular  chemistry
■650  4▼aChemistry
■650  4▼aAnalytical  chemistry
■653    ▼aFischer-Tropsch
■653    ▼aFormyl
■653    ▼aHydride  transfer
■653    ▼aHydroxymethyl
■653    ▼aCatalytic  intermediates
■690    ▼a0488
■690    ▼a0431
■690    ▼a0485
■690    ▼a0486
■71020▼aThe  University  of  North  Carolina  at  Chapel  Hill▼bChemistry.
■7730  ▼tDissertations  Abstracts  International▼g87-02B.
■790    ▼a0153
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358889▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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