Introduction to Stereogenic Nitrogen
A close inspection of the pseudoephedrine and ephedrine isomers suggests that other stereogenic center, the nitrogen, is present. As defined before, in shape single-bonded nitrogen is pyramidal, with the non-bonding electron pair pointing to the not occupied corner of a tetrahedral region. Its configuration is chiral because the nitrogen in these compounds is bonded to three distinct groups. The non-identical mirror-image configurations are demonstrated in the picture that is displayed below (the molecule's remainder is represented by R, and the electron pair is represented in yellow color). There would be four additional stereoisomers of pseudoephedrine and ephedrine if these configurations were stable. Though, pyramidal nitrogen is usually not configurationally stable. It fastly inverts its configuration (equilibrium arrows) by passing from a planar, sp2-hybridized transition state, leading to the mixture of interconverting R and S configurations. A 50:50 (racemic) mixture of R and S configurations would present at equilibrium if the nitrogen atom were the only chiral center in the molecule. A mixture of diastereomers will result if another chiral center is present, as in the ephedrin isomers. In any event nitrogen groups like this, if exist in a compound, do not contribute to isolable stereoisomers.
Email based Stoichiometry Homework Help -Assignment Help
Tutors at the www.tutorsglobe.com are committed to provide the best quality Stoichiometry homework help - assignment help. They use their experience, as they have solved thousands of the Stoichiometry assignments, which may help you to solve your complex Stoichiometry homework. You can find solutions for all the topics come under the Stoichiometry. The dedicated tutors provide eminence work on your Organic Chemistry homework help and devoted to provide K-12 level Chemistry to college level chemistry help before the deadline mentioned by the student. Stoichiometry homework help is available here for the students of school, college and university. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Qualified and Experienced Stoichiometry Tutors at www.tutorsglobe.com
Tutors at the www.tutorsglobe.com take pledge to provide full satisfaction and assurance in Stoichiometry homework help. Students are getting Chemistry homework help services across the globe with 100% satisfaction. We value all our service-users. We provide email based Stoichiometry homework help - assignment help. You can join us to ask queries 24x7 with live, experienced and qualified Chemistry tutors specialized in Stoichiometry.
tutorsglobe.com principle of effective demand assignment help-homework help by online simple theory of income determination tutors
tutorsglobe.com examples of microphyllous pteridophytes assignment help-homework help by online pteridophytes tutors
The vascular tissue system contains phloem and xylem. The xylem and phloem’s elements are all the time organized in groups.
Theory and lecture notes of Economics of Information all along with the key concepts of economics of information, Problem of agency, asymmetric information, Theory of a Firm, stylized firm. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Economics of Information.
tutorsglobe.com wellness and lifestyle analysis assignment help-homework help by online humanities tutors
tutorsglobe.com menstrual phase assignment help-homework help by online menstrual cycle tutors
Electromagnetic Four-vector tutorial all along with the key concepts of Lorentz Transformation as Orthogonal Transformation, Algebra of Four-Vector, Space-Time and its Geometry
www.tutorsglobe.com offers price determination homework help - determine equilibrium price homework help, answering questions to price determination, economics solutions by online tutors.
tutorsglobe.com microbial related assimilation assignment help-homework help by online sulphur cycle tutors
www.tutorsglobe.com offers Control Constructs homework help, assignment help, case study, writing homework help, online tutoring assistance by computer science tutors.
Application of Genetics tutorial all along with the key concepts of principles of Heredity, heredity in Agriculture, Cross Fertilization, Self Fertilization, Sexual Reproduction, Asexual Reproduction, Genetics in Medicine, Genetics in Technology
tutorsglobe.com hypothalamus assignment help-homework help by online the brain tutors
tutorsglobe.com nutrition in fungi assignment help-homework help by online fungi tutors
Proteins and Nucleic Acids tutorial all along with the key concepts of Introduction to protein, Introduction to Nucleic Acids, Protein and Nucleic Acid Relationship, Protein-Nucleic Acid Interactions
tutorsglobe.com respiration in bacteria assignment help-homework help by online bacteria tutors
1950223
Questions Asked
3689
Tutors
1473857
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!