Physical state covalent compounds

Properties of Ionic and Covalent Compounds Physical State... 

Another definition from a patent application states that the term cocrystals is meant to define crystalline phase wherein at least two components of the crystal interact by hydrogen bonding and possibly by other non-covalent interactions rather than by ion pairing. The primary difierence is the physical state of the pure isolated compound. If one component is liquid at room temperature, the crystals are referred to as solvates if both components are solids at room temperature, the products are referred to as co-crystals. Claims 1 and 2 of that patent application recite ... 

The slow ambient pressure thermochemical decomposition process of HMX may involve more than one mechanistic pathway and specific rate-controlling step. Isothermal DSC (IDSC) investigation of the HMX and deuterium labeled HMX-ds compounds over a 551—553 K temperature range (mp HMX = 555 K), reveal three (fissimilar KDIE values (Figure 1), and each occurs in a different physical state (Figure 2). The early induction period reveals a 1<> KDIE which indicates covalent C—H bond rupture of the HMX molecule, or C—H bond... 

Many textbooks still state that organic lithium compounds have appreciable covalent character. This misconception arises from physical properties such as relatively low melting points and solubility in hydrocarbons or other nonpolar solvents. It is true that these properties... 

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