• Intermediate reaction mechanism query

    Updated: 2010-03-19 11:45:35
    Hello, I'm hoping someone can help me shed some light on this. I've come across a reaction in a book that's relevant to the research I'm doing. However, I can't seem to fully figure out how the reaction proceeds from start to finish. If I could see one or two intermediate reaction mechanisms with curly arrows it might clear things up for me. Does anyone have any suggestions for one or two intermediate reaction mechanisms? I know the presence of copper plays an important role and that the amide nitrogen now plays an important part in the bonding with new reaction centres becoming involved in the bonding of the peptide after the ionisation of the amide proton. After that I'm lost. Any help would be greatfully appreciated. I've attached the start and end diagrams (hopefully!)

  • Re: neutron

    Updated: 2010-03-19 11:39:35
    since 9Be + 4He --> 13Cso do u mean that when C-13 deexcited, it is possible that the neutrons given out were came from alpha particles?(because there are 2 neutron from He-4 in C-13)

  • Re: FGs attacked by R-Li but not LiAlH4

    Updated: 2010-03-19 11:29:18
    This is an interesting question. Is this of your own curiosities or is this a question for a class? At first glance I read this and wanted to say an alcohol or water (they would both give the same product with either, right?)... but I don't think that's the nature of your question.I suppose this question is not really asking for a group that will react exclusively with LAH or BuLi, but more so about the inherent reactivity of each? I consider LAH to be a hydride source, and best for reductions of carbonyls, while I consider BuLi a base (or nucleophile depending on conditions). I can think of a few different compounds that would give the same product, you just have to set up your starting materials to match.

  • How does fat change to glucose?

    Updated: 2010-03-19 11:16:30
    How does fat change to glucose? Please give links, slideshows and e-books, where are reactions, schemes, mechanisms and other useful information. Thank you!

  • Re: Intermediate reaction mechanism query

    Updated: 2010-03-19 00:22:00
    Any atom with lone pairs can coordinate to the copper cation. The more basic, the more likely it will coordinate. When you deprotonate the nitrogen, it is more nucleophilic and basic than the carbonyl oxygen, so the result is that the two point binding of this molecule changes.

  • ACS Presidential Symposia

    Updated: 2010-03-16 19:30:00
    Throughout 2010, ACS President Joseph S. Francisco is committed to helping members and future members develop the skills necessary to meet the needs and expectations of employers, especially those in the global chemical enterprise. He is focusing on four areas that will have an underlying global perspective: Education, Innovation, Employment, and Partnerships. Francisco is hosting a number of presidential symposia at the Spring National Meeting in San Francisco, so be sure to consult the listings in the online technical program.

  • Building Your Personal San Francisco Itinerary

    Updated: 2010-03-16 19:30:00
    The Spring 2010 ACS National Meeting in San Francisco starts this coming Sunday, and before you pack your suitcase, you'll want to prepare your personal itinerary and schedule for the meeting. On the technical program web page, there's a handy online tool for organizing your week at the meeting: As you browse the online technical program, you can mark technical sessions or other meeting events that you'd like to attend, then download your daily meeting schedule to your PDA or Outlook calendar. We look forward to seeing you in San Francisco, and to helping you make the most of your time at the meeting!

  • O Level Chemistry: Mole Calculations – Concentrations of Solutions

    Updated: 2010-03-09 01:33:25
    In Mole Calculations, many students lose marks in questions related to Volumetric Analysis, especially on those that requires them to understand the concepts of CONCENTRATIONS of solutions. Volumetric Analysis are always a highlight in our annual Mole Calculations Mastery Workshop. Concentrations of a solution refers to the amount of solute dissolved in 1 dm3 of the [...]

  • O Level Chemistry: Mole Calculations – Balanced Chemical & Ionic Equations

    Updated: 2010-03-08 05:56:46
    As you can see from the on-going survey on the right hand side, Mole Calculations (commonly known as Mole Concepts) has been voted by students as the #1 Killer Topic in O Level Chemistry (and other equivalent basic Chemistry Syllabus). In fact, a large number of students skip the calculation-based questions when they see it on [...]

  • Extension to Early Bird Price Registration for Mole Calculations Mastery Workshop 2010

    Updated: 2010-03-05 01:00:00
    Quick Announcement for Singapore Readers: Extension to Early Bird Price Registration for Mole Calculations Mastery Workshop 2010 We received a handful of requests for us to extend the bird early registration for the workshop as many schools in Singapore have yet to announce their March Holidays schedule. We hear you and would want to help committed students to [...]

  • Toxin detection, in the palm of your hand

    Updated: 2010-03-04 14:00:00
    Researchers detect and quantitate unlabeled chemical toxins with a portable device.

  • Registration for 2010 GCE ‘N’, ‘O’ & ‘A’ Levels Examinations for Private Candidates

    Updated: 2010-03-04 08:24:51
    Registration for 2010 GCE ‘N’, ‘O’ & ‘A’ Levels Examinations for Private Candidates Dateline: 3 April 2010 For more information, please call MOE Customer Serive at 6872 2220 or visit http://www.seab.gov.sgRelated Articles: 2009 GCE N, O and A Levels Examinations: For Private Candidates 2009 GCE O Level Examination Calendar (Tentative) Official: Release of 2009 GCE ‘O’ Level Results on 11th [...]

  • O Level Chemistry: Mole Calculation Exam-Based Application Question

    Updated: 2010-02-27 17:09:23
    Mole Calculations, or commonly known as “The MOLE” or “Mole Concepts” is regarded by many of the GCE ‘O’ Level Chemistry students (as well as IGCSE and IB / IP Chemistry students) to be one of the most challenging and difficult topic. Let’s not mention that many students are not able to score in this topic! In [...]

  • Pittcon 2010 In Orlando

    Updated: 2010-02-18 14:00:00
    This year’s pittcon aims to be the most comprehensive conference and exposition on laboratory science.

  • An MS method for proteomic analysis of small samples

    Updated: 2010-02-11 14:00:00
    Researchers develop an MS shotgun proteomic method to tackle small numbers of cancer cells in blood.

  • Foil And Tape Serve Raman

    Updated: 2010-02-04 14:00:00
    Pastelike silver dendrites generated on aluminum foil and transferred to Scotch tape serves as a substrate for SERS.

  • Udo A. Th. Brinkman wins ACS Award in Chromatography

    Updated: 2010-02-04 14:00:00
    ACS Award In Chromatography.

  • Naked-eye colorimetric analysis of heparin and its derivatives

    Updated: 2010-01-28 14:00:00
    A new colorimetric technique could provide a rapid, naked-eye assay of heparin levels in serum.

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