Synthesis and Reactivity of Vaska’s Comple Lab Report

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Synthesis and Reactivity of Vaska’s Comple

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Chem 410 Lab Report Guidelines for Experiment #9 – Synthesis and Reactivity of Vaska’s Complex Experiment #9 can be found on p. 189 of the laboratory manual. Please use the lab report templates available on Blackboard prepare a report based on your assigned section (please see table below). Due Date Experiment 4/12/19 9 Abstract Lab Report Section Assignment Results & Introduction Experimental Discussion 3,8,13 4,9,14 5,10,15 1,6,11 Conclusions 2,7,12 Questions to be Answered: 1) How does the νCO stretching frequency of coordinated CO compare with free CO (2143 cm-1), and how can the difference be explained in terms of bonding (σ and π) with the metal? 2) What is the importance oxidative additions in catalysis? 3) How much does it cost to purchase IrCl3•3H2O and Vaska’s complex? Evaluate the total cost of the materials used in your synthesis. 4) What is the role of aniline in the synthesis of Vaska’s complex? Data to be included in Supporting Information: 1) 2) 3) 4) 5) Cover page with Table of Contents IR spectra of products Sample % yield calculations NMR Spectra of products Carbon copies from lab notebook TITLE (Word Style "BA_Title"). The title should accurately, clearly, and concisely reflect the emphasis and content of the paper. The title must be brief and grammatically correct. Do NOT delete the space above the title. AUTHOR NAMES (Word Style "BB_Author_Name"). Include in the byline all those who have made substantial contributions to the work, even if the paper was actually written by only one person. Use first names, initials, and surnames (e.g., John R. Smith) or first initials, second names, and surnames (e.g., J. Robert Smith). Do not use only initials with surnames (e.g., J. R. Smith) because this causes indexing and retrieval difficulties and interferes with unique identification of an author. Do not include professional or official titles or academic degrees. At least one author must be designated with an asterisk as the author to whom correspondence should be addressed. AUTHOR ADDRESS (Word Style "BC_Author_Address"). The affiliation should be the institution where the work was conducted. If the present address of an author differs from that at which the work was done, indicate with a symbol and give the Present Address under Author Information. If more than one address, use symbols to match author names to address(es). Submitted: [Enter submission date] INTRODUCTION TEXT (Word Style "TA_Main_Text"). For full instructions, please see the journal’s Instructions for Authors. Do not modify the font in this or any other section, as doing so will not give an accurate estimate of the formatting for publication and final length of the paper. FIGURES (Word Style "VA_Figure_Caption"). Each figure must have a caption that includes the figure number and a brief description, preferably one or two sentences. The caption should follow the format "Figure 1. Figure caption." All figures must be mentioned in the text consecutively and numbered with Arabic numerals. The caption should be understandable without reference to the text. Whenever possible, place the key to symbols in the artwork, not in the caption. To insert the figure into the template, be sure it is already sized appropriately and paste before the figure caption. For formatting double-column figures, see the instructions at the end of the template. Do NOT modify the amount of space before and after the caption as this allows for the rules, space above and below the rules, and space above and below the figure to be inserted upon editing. SCHEMES (Word Style "VC_Scheme_Title"). Groups of reactions that show action are called schemes. Schemes may have brief titles describing their contents. The title should follow the format "Scheme 1. Scheme Title". Schemes may also have footnotes (use Word Style "FD_Scheme_Footnote"). To insert the scheme into the template, be sure it is already sized appropriately and paste after the scheme title. For formatting double-column schemes, see the instructions at the end of the template. Do NOT modify the amount of space before and after the title as this allows for the rules, space above and below the rules, and space above and below the scheme to be inserted upon editing. CHARTS (Word Style "VB_Chart_Title"). Groups of structures that do not show action are called charts. Charts may have brief titles describing their contents. The title should follow the format "Chart 1. Chart Title". Charts may also have footnotes (use Word Style "FC_Chart_Footnote"). To insert the chart into the template, be sure it is already sized appropriately and paste after the chart title. For formatting double-column charts, see the instructions at the end of the template. Do NOT modify the amount of space before and after the title as this allows for the rules, space above and below the rules, and space above and below the chart to be inserted upon editing. TABLES. Each table must have a brief (one phrase or sentence) title that describes its contents. The title should follow the format "Table 1. Table Title" (Word Style "VD_Table_Title"). The title should be understandable without reference to the text. Put details in footnotes, not in the title (use Word Style "FE_Table_Footnote"). Do NOT modify the amount of space before and after the title as this allows for the space above and below the table to be inserted upon editing. Use tables (Word Style “TC_Table_Body”) when the data cannot be presented clearly as narrative, when many precise numbers must be presented, or when more meaningful interrelationships can be conveyed by the tabular format. Do not use Word Style “TC_Table_Body” for tables containing artwork. Tables should supplement, not duplicate, text and figures. Tables should be simple and concise. It is preferable to use the Table Tool in your word-processing package, placing one entry per cell, to generate tables. Displayed equations can be inserted where desired making sure they are assigned Word Style "Normal". Displayed equations can only be one column wide. If the artwork needs to be two columns wide, it must be relabeled as a figure, chart, or scheme and mentioned as such in the text. ANSWERS TO QUESTIONS ASSOCIATED CONTENT Supporting Information Word Style "Section_Content"). A listing of the contents of each file supplied as Supporting Information should be included. For instructions on what should be included in the Supporting Information, refer to the Chem 410 syllabus. AUTHOR INFORMATION Corresponding Author (Word Style "Section_Content"). Give contact information for the author(s) to whom correspondence should be addressed. REFERENCES (Word Style "TF_References_Section"). References are placed at the end of the manuscript. Authors are responsible for the accuracy and completeness of all references. Examples of the recommended formats for the various reference types can be found at http://pubs.acs.org/page/4authors/index.html. Detailed information on reference style can be found in The ACS Style Guide, available from Oxford Press. Table of Contents Graphic (TOC) 3 ...
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Synthesis of Vaska’s complex by microscale synthesis
John R. Smith
AUTHOR ADDRESS (Word Style "BC_Author_Address"). The affiliation should be the institution where the work was
conducted. If the present address of an author differs from that at which the work was done, indicate with a symbol and give
the Present Address under Author Information. If more than one address, use symbols to match author names to address(es).

Submitted: [Enter submission date]

INTRODUCTION
The synthesis of a compound by microscale techniques has advantages over conventional synthesis as lower amounts of solvents and solutes (less than 100 mg) are used. In addition, a microscale synthesis is usually used when a limited amount of reagent is available or when the reagent is valuable. In this experiment very expensive metal was used, iridium (Ir). The microscale
synthesis is environmentally friendly as low amount of waste is
generated after finishing the synthesis.
Relating the technical characteristics of the microscale synthesis, it is crucial to use small reaction vessels and to minimize
sample handling.
Throughout the understanding of the behavior of transchlorcarbonyl bis (triphenylphosphine) iridium (I) or
IrCl(Co)[P(C6H5)3]2 also known as Vaska’s Complex, many important concepts in organometalic chemistry can be explained. As
the iridium has 16 electrons (unsaturated) it can be easily forms
the complexes.
The complex can react with the wide number of molecules (H2,
HCl, CH3I, etc) during which iridium could be inserted into the σ
bond of a certain molecule. This chemical reaction is called oxidative addition.
The importance of Vaska’s complex lies in fact that this complex could reversibly to bind oxygen. By mentioned reaction it
can be performed the simulation of biological carriers of
O2.During this reaction Ir center becomes IIII.
By using IR spectroscopy, the characterization of bounds in Vaska’s complex is usually carried out. The most frequently used IR
techniques is by measuring of IR spectrum of compound dissolved in appropriate solvents. Other mechanisms involve analysis of a compound as a mull, or as a compressed solid pallet. The
application of the mull is a challenging task and this technique is
rarely used in the Vaska’s complex characterization. By the application of pellet techniques, the mixture of IR transparent (KBr)
substances and the Vaska’s complex is combined in order to prepare fine powder. During the KBr application possible interference could be expected.
In the Vaska’s complex, one of the most important groups for
absorption of IR spectrum is carbonyl (CO) group. Additionally,
CO group in the Vaska’s complex absorb IR spectrum in a region
where only few organic compounds absorb. The interaction of the
CO π orbital with the iridium d orbital contributes to this fact.
During this interaction the electron density is transferred to the
CO π* orbital. As a consequence, the carbonyl stretching band in
CO complexes decrease.

ANSWERS TO QUESTIONS
Answer 1) In the coordinated CO, the absorption of
the IR spectrum occurred as a consequence of the
overlapping of the π orbital and d orbital of the metal. In the...

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Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

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