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Hydride-Supported Actinide-Transition Metal Complexes
Hydride-Supported Actinide-Transition Metal Complexes
Hydride-Supported Actinide-Transition Metal Complexes

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자료유형  
 학위논문 서양
최종처리일시  
20250211151431
ISBN  
9798383206485
DDC  
540
저자명  
Ye, Christopher Ziyu.
서명/저자  
Hydride-Supported Actinide-Transition Metal Complexes
발행사항  
[Sl] : University of California, Berkeley, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
121 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
주기사항  
Advisor: Arnold, John.
학위논문주기  
Thesis (Ph.D.)--University of California, Berkeley, 2024.
초록/해제  
요약Chapter 1. The field of f-block-transition metal hydride chemistry is introduced and summarized. Key properties of these compounds such as small molecule activation chemistry and H2 uptake and release are outlined. The dearth of actinide-transition metal species despite their potential for fundamental bonding insight and novel reactivity is highlighted, and the motivations for studying these compounds are stated.Chapter 2. Reaction of K[Cp*IrH3] with actinide halides led to multimetallic actinide-transition metal hydrides U{(μ-H)3IrCp*}4 and Th{[(μ-H)2(H)IrCp*]2[(μ-H)3IrCp*]2}, respectively. These complexes feature an unexpected, significant discrepancy in hydride bonding modes; the uranium species contains twelve bridging hydrides while the thorium complex contains ten bridging hydrides and two terminal, Ir-bound hydrides. Use of a U(III) starting material with the same potassium iridate resulted in the octanuclear complex {U[(μ2-H)3IrCp*]2[(μ3-H)2IrCp*]}2. Computational studies indicate significant bonding character between U/Th and Ir in the tetrairidate compounds, the first reported evidence of actinide-iridium covalency. In addition, these studies attribute the variation in hydride bonding between the tetrairidate complexes to differences in dispersion effects. This work establishes a novel route to synthesizing actinide-transition metal polyhydrides with close metal-metal contacts.Chapter 3. Conversion of Cp*OsH5 to K[Cp*OsH4] with KBn, followed by reaction with tetravalent actinide halides results in the synthesis of uranium- and thorium-osmium heterometallic polyhydride complexes. Through these species, An-Os bonding and the reactivity of An-Os interactions are studied. These complexes are formally sixteen-coordinate, the highest observed coordination number for uranium and thorium. Computational studies suggest the presence of a significant bonding interaction between the actinide center and the four coordinated osmium centers, the first report of this behavior between osmium and an actinide. Upon photolysis, these complexes underwent intramolecular C-H activation with the formation of an Os-Os bond, while the thorium complex was able to activate an additional C-H bond of the benzene solvent, resulting in a μ-η1,η1 phenyl ligand across one Th-Os interaction. These results highlight the unique reactivity that can arise from actinide and transition metal centers in proximity, and expand the scope of actinide photolysis reactivity.Chapter 4. The third Cp*-supported transition metal polyhydride - Cp*ReH6 - was shown to be a competent partner to actinide hydrides. The synthesis of actinide tetrarhenate complexes completed a series of iridate, osmate, and rhenate polyhydrides, allowing for structural and bonding comparisons. Computational studies examine the bonding interactions, particularly between metals, in these complexes. Several factors affect metal-metal distances and covalency for the actinide tetrametallates, including metal oxidation state, coordination number, and dispersion effects. The osmium and rhenium octametallic U2M6 clusters are reported as well, with similar analysis of structure and electronics.Chapter 5. Reaction of the potassium iridate K[Cp*IrH3] with a bulky uranium(III) metallocene yielded a heterobimetallic U(III)-Ir species. Reactivity of this complex with CS2 is described, resulting in the novel ethanetetrathiolate fragment, as produced via hydride insertion and C-C coupling. This demonstrates the ability to combine the hydride insertion chemistry of transition metal hydrides with C-C coupling observed in U(III) compounds by bringing both metal centers in close proximity.
일반주제명  
Chemistry
일반주제명  
Inorganic chemistry
일반주제명  
Analytical chemistry
키워드  
Actinide
키워드  
Bimetallic
키워드  
Hydride
키워드  
Transition metal
키워드  
Potassium
키워드  
Polyhydrides
기타저자  
University of California, Berkeley Chemistry
기본자료저록  
Dissertations Abstracts International. 86-01B.
전자적 위치 및 접속  
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MARC

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■0820  ▼a540
■1001  ▼aYe,  Christopher  Ziyu.
■24510▼aHydride-Supported  Actinide-Transition  Metal  Complexes
■260    ▼a[Sl]▼bUniversity  of  California,  Berkeley▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a121  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-01,  Section:  B.
■500    ▼aAdvisor:  Arnold,  John.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2024.
■520    ▼aChapter  1.  The  field  of  f-block-transition  metal  hydride  chemistry  is  introduced  and  summarized.  Key  properties  of  these  compounds  such  as  small  molecule  activation  chemistry  and  H2  uptake  and  release  are  outlined.  The  dearth  of  actinide-transition  metal  species  despite  their  potential  for  fundamental  bonding  insight  and  novel  reactivity  is  highlighted,  and  the  motivations  for  studying  these  compounds  are  stated.Chapter  2.  Reaction  of  K[Cp*IrH3]  with  actinide  halides  led  to  multimetallic  actinide-transition  metal  hydrides  U{(μ-H)3IrCp*}4  and  Th{[(μ-H)2(H)IrCp*]2[(μ-H)3IrCp*]2},  respectively.  These  complexes  feature  an  unexpected,  significant  discrepancy  in  hydride  bonding  modes;  the  uranium  species  contains  twelve  bridging  hydrides  while  the  thorium  complex  contains  ten  bridging  hydrides  and  two  terminal,  Ir-bound  hydrides.  Use  of  a  U(III)  starting  material  with  the  same  potassium  iridate  resulted  in  the  octanuclear  complex  {U[(μ2-H)3IrCp*]2[(μ3-H)2IrCp*]}2.  Computational  studies  indicate  significant  bonding  character  between  U/Th  and  Ir  in  the  tetrairidate  compounds,  the  first  reported  evidence  of  actinide-iridium  covalency.  In  addition,  these  studies  attribute  the  variation  in  hydride  bonding  between  the  tetrairidate  complexes  to  differences  in  dispersion  effects.  This  work  establishes  a  novel  route  to  synthesizing  actinide-transition  metal  polyhydrides  with  close  metal-metal  contacts.Chapter  3.  Conversion  of  Cp*OsH5  to  K[Cp*OsH4]  with  KBn,  followed  by  reaction  with  tetravalent  actinide  halides  results  in  the  synthesis  of  uranium-  and  thorium-osmium  heterometallic  polyhydride  complexes.  Through  these  species,  An-Os  bonding  and  the  reactivity  of  An-Os  interactions  are  studied.  These  complexes  are  formally  sixteen-coordinate,  the  highest  observed  coordination  number  for  uranium  and  thorium.  Computational  studies  suggest  the  presence  of  a  significant  bonding  interaction  between  the  actinide  center  and  the  four  coordinated  osmium  centers,  the  first  report  of  this  behavior  between  osmium  and  an  actinide.  Upon  photolysis,  these  complexes  underwent  intramolecular  C-H  activation  with  the  formation  of  an  Os-Os  bond,  while  the  thorium  complex  was  able  to  activate  an  additional  C-H  bond  of  the  benzene  solvent,  resulting  in  a  μ-η1,η1  phenyl  ligand  across  one  Th-Os  interaction.  These  results  highlight  the  unique  reactivity  that  can  arise  from  actinide  and  transition  metal  centers  in  proximity,  and  expand  the  scope  of  actinide  photolysis  reactivity.Chapter  4.  The  third  Cp*-supported  transition  metal  polyhydride  -  Cp*ReH6  -  was  shown  to  be  a  competent  partner  to  actinide  hydrides.  The  synthesis  of  actinide  tetrarhenate  complexes  completed  a  series  of  iridate,  osmate,  and  rhenate  polyhydrides,  allowing  for  structural  and  bonding  comparisons.  Computational  studies  examine  the  bonding  interactions,  particularly  between  metals,  in  these  complexes.  Several  factors  affect  metal-metal  distances  and  covalency  for  the  actinide  tetrametallates,  including  metal  oxidation  state,  coordination  number,  and  dispersion  effects.  The  osmium  and  rhenium  octametallic  U2M6  clusters  are  reported  as  well,  with  similar  analysis  of  structure  and  electronics.Chapter  5.  Reaction  of  the  potassium  iridate  K[Cp*IrH3]  with  a  bulky  uranium(III)  metallocene  yielded  a  heterobimetallic  U(III)-Ir  species.  Reactivity  of  this  complex  with  CS2  is  described,  resulting  in  the  novel  ethanetetrathiolate  fragment,  as  produced  via  hydride  insertion  and  C-C  coupling.  This  demonstrates  the  ability  to  combine  the  hydride  insertion  chemistry  of  transition  metal  hydrides  with  C-C  coupling  observed  in  U(III)  compounds  by  bringing  both  metal  centers  in  close  proximity.
■590    ▼aSchool  code:  0028.
■650  4▼aChemistry
■650  4▼aInorganic  chemistry
■650  4▼aAnalytical  chemistry
■653    ▼aActinide
■653    ▼aBimetallic
■653    ▼aHydride
■653    ▼aTransition  metal
■653    ▼aPotassium
■653    ▼aPolyhydrides
■690    ▼a0485
■690    ▼a0488
■690    ▼a0486
■71020▼aUniversity  of  California,  Berkeley▼bChemistry.
■7730  ▼tDissertations  Abstracts  International▼g86-01B.
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161694▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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