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Aromaticity in Heterocyclic Compounds by Tadeusz Marek Krygowski (English) Hardc

Description: Aromaticity in Heterocyclic Compounds by Tadeusz Marek Krygowski, Michal Ksawery Cyranski Estimated delivery 3-12 business days Format Hardcover Condition Brand New Description Aromaticity is a notion that appeared in the mid-nineteenth century to differentiate between unsaturated hydrocarbons and formally unsaturated benzene [1–3]. Publisher Description Aromaticity is a notion that appeared in the mid-nineteenth century to differentiate between unsaturated hydrocarbons and formally unsaturated benzene [1–3]. At the end of the nineteenth century it seemed that cyclicity was a necessary condition for differentiation between the two, but at the beginning of the twentieth century it turned out that the above assumption was not correct because cyclooctatetraene exhibited typical properties known for polyenes [4]. The essential property of b- zene-like compounds, often identified with aromatic compounds, was low react- ity. Hence thermodynamic stability was defined as resonance energy [5, 6] and was the first quantitative measure of aromaticity. Many theoretical approaches were proposed later to estimate this quantity, and now the criterion is often considered to be the most fundamental [7]. Almost at the same time, magnetic susceptibility was used to describe aromaticity [8, 9]. Consequently, many concepts based on mag- tism were developed, probably the most effective in assessment of aromaticity being nucleus independent chemical shift (NICS) [10] or Fowlers maps of ring currents [11]. The criterion served Schleyer as a basis for a definition of aromat- ity: "Compounds which exhibit significantly exalted diamagnetic susceptibility are aromatic. Cyclic delocalisation may also result in bond length equalization, abn- mal chemical shifts and magnetic anisotropies, as well as chemical and physical properties which reflect energetic stabilisation"[12]. Details ISBN 3540683291 ISBN-13 9783540683292 Title Aromaticity in Heterocyclic Compounds Author Tadeusz Marek Krygowski, Michal Ksawery Cyranski Format Hardcover Year 2009 Pages 344 Edition 2009th Publisher Springer-Verlag Berlin and Heidelberg GmbH & Co. KG GE_Item_ID:137771456; About Us Grand Eagle Retail is the ideal place for all your shopping needs! With fast shipping, low prices, friendly service and over 1,000,000 in stock items - you're bound to find what you want, at a price you'll love! Shipping & Delivery Times Shipping is FREE to any address in USA. Please view eBay estimated delivery times at the top of the listing. Deliveries are made by either USPS or Courier. We are unable to deliver faster than stated. International deliveries will take 1-6 weeks. NOTE: We are unable to offer combined shipping for multiple items purchased. This is because our items are shipped from different locations. Returns If you wish to return an item, please consult our Returns Policy as below: Please contact Customer Services and request "Return Authorisation" before you send your item back to us. Unauthorised returns will not be accepted. Returns must be postmarked within 4 business days of authorisation and must be in resellable condition. Returns are shipped at the customer's risk. We cannot take responsibility for items which are lost or damaged in transit. For purchases where a shipping charge was paid, there will be no refund of the original shipping charge. Additional Questions If you have any questions please feel free to Contact Us. Categories Baby Books Electronics Fashion Games Health & Beauty Home, Garden & Pets Movies Music Sports & Outdoors Toys

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Aromaticity in Heterocyclic Compounds by Tadeusz Marek Krygowski (English) Hardc

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Restocking Fee: No

Return shipping will be paid by: Buyer

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ISBN-13: 9783540683292

Book Title: Aromaticity in Heterocyclic Compounds

Number of Pages: Xiii, 344 Pages

Language: English

Publication Name: Aromaticity in Heterocyclic Compounds

Publisher: Springer Berlin / Heidelberg

Publication Year: 2009

Subject: Chemistry / Organic, Chemistry / General

Item Weight: 27.2 Oz

Type: Textbook

Item Length: 9.3 in

Author: Michal Ksawery Cyranski

Subject Area: Science

Series: Topics in Heterocyclic Chemistry Ser.

Item Width: 6.1 in

Format: Hardcover

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