Honey and Honey Cookery

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A Novel Bis(phosphido)pyridine [PNP]^(2−) Pincer Ligand and Its Potassium and Bis(dimethylamido)zirconium(IV) Complexes

A novel PNP bis(secondary phosphine)pyridine pincer ligand, 2,6-bis(2-(phenylphosphino)phenyl)pyridine, has been prepared in high yield, and the properties of the doubly deprotonated form as a ligand in K_4(PNP)_2(THF)_6 and (PNP)Zr(NMe_2)_2 have been investigated. The neutral PNP ligand has been isolated as a mixture of noninterconverting diastereomers, due to the presence of two chirogenic phosphorus atoms of the secondary phopshines, but coordination of the dianionic form to potassium and zirconium allows for isolation of a single diastereomer in near-quantitative yield. The structure of a bis(dimethylamido)zirconium(IV) derivative of the bis(phosphido)pyridine ligand and DFT calculations suggest that the phosphides do not π-bond to early transition metals, likely due to geometric strain and possibly orbital size mismatch between phosphorus and zirconium. As a result, the soft phosphides are prone to formation of insoluble oligomers with substantial bridging of the phosphido lone pairs to other zirconium centers

Evaluation of capacitors for space propulsion applications final progress report

Low inductance energy storage capacitors for space propulsion application

Who Are User Entrepreneurs? Findings on Innovation, Founder Characteristics, and Firm Characteristics

Documents the prevalence of innovators who create products or services for their own use then start firms, by industry and type. Examines founder and firm characteristics, revenue growth, job creation, R&D investment, and intellectual property creation

History of endemic Hawaiian birds. Introduction

Reports were scanned in black and white at a resolution of 600 dots per inch and were converted to text using Adobe Paper Capture Plug-in. In order to view these files properly you will need Adobe Acrobat Reader 5.0 or higher.The history of endemic Hawaiian birds is developed in three major parts. Narrative accounts of 69 taxa, based on records since 1778, are detailed in Part I. Major ecological factors of population changes, such as depletion of food by foreign organisms, predation, disease, and habitat alteration, are treated in Part II. Chronological, geographical, and ecological elements of avian depopulation are synthesized and offered with conclusions in Part III. The Introduction states the objectives, lists the endemic avifauna, defines the historical scope, and outlines the complete work.Hawaii Volcanoes National Park; National Park Service Contract No. CX 8000 8 001

History of endemic Hawaiian birds: Part I: population histories, species accounts: introduction

Reports were scanned in black and white at a resolution of 600 dots per inch and were converted to text using Adobe Paper Capture Plug-in.The purpose and scope of Part I: Population Histories--Species Accounts is presented. Organization of geographical, chronological, and bibliographical details is explained. Assistance in obtaining information is acknowledged.Hawaii Volcanoes National Park; National Park Service Contract No. CX 8000 8 001