Ethynyl derivatives of silicon, germanium, tin, and lead

CONTENTS
I. Introduction 467
II. Preparation of ethynyl derivatives of silicon, germanium, tin, and lead 468
III. Preparation of prop-2-ynyl derivatives of silicon, germanium, tin, and lead 469
IV. Chemical properties of ethynyl organoelemental compounds 470
V. Physical properties 472
VI. Organic polymers of silicon, germanium, and tin containing acetylenic groupings 474