The crystal structures of inorganic hydroborates (salts and coordination compounds with anions containing hydrogen bonded to boron) except for the simplest anion, borohydride BH 4 −, are analyzed regarding their structural prototypes found in the inorganic databases such as Pearson’s Crystal Data. Inorganic Chemistry is primarily designed to be a student text but is well received as a reference book for those working in the field of inorganic chemistry. Only the compounds with hydroborate as the only type of anion are reviewed, although including compounds gathering more than one different hydroborate (mixed anion). Now in its fourth edition, Housecroft & Sharpes Inorganic Chemistry is a well-respected and leading international textbook. Carbaborane anions and partly halogenated hydroborates are included. Hydroborates containing anions other than hydroborate or neutral molecules such as NH 3 are not discussed. The coordination polyhedra around the cations, including complex cations, and the hydroborate anions are determined and constitute the basis of the structural systematics underlying hydroborates chemistry in various variants of anionic packing. The latter is determined from anion–anion coordination with the help of topology analysis using the program TOPOS. The Pauling rules for ionic crystals apply only to smaller cations with the observed coordination number within 2–4. All non-molecular hydroborate crystal structures can be derived by simple deformation of the close-packed anionic lattices, i.e., cubic close packing ( ccp) and hexagonal close packing ( hcp), or body-centered cubic ( bcc), by filling tetrahedral or octahedral sites.įor bigger cations, the predictive power of the first Pauling rule is very poor. This review on the crystal chemistry of hydroborates is a contribution that should serve as a roadmap for materials engineers to design new materials, synthetic chemists in their search for promising compounds to be prepared, and materials scientists in understanding the properties of novel materials. Hydroborates are anions containing hydrogen bonded to boron. Inorganic Chemistry is primarily designed to be a student text but is well-received as a reference book for those working in the field of inorganic chemistry. They are also sometimes referred to as “boranes” this term is, however, used for neutral molecules B xH y according to IUPAC. Summary: Now in its fourth edition, Housecroft & Sharpes Inorganic Chemistry is a well-respected and leading international textbook. Inorganic hydroborates are salts or coordination compounds where one of the ligands is the hydroborate. The bonding in boron clusters of boranes and hydroborates was explained by Lipscomb using the concept of a three-electron-two-center bond. "synopsis" may belong to another edition of this title.The concept was further developed in the Polyhedral Skeletal Electron Pair theory (PSEPT) also known as Wade–Mingos rules based on a molecular orbital treatment of the bonding. Step-by-step video answers explanations by expert educators for all Inorganic Chemistry 4th by Catherine E. Inorganic Chemistry 5th edition is also accompanied by an extensive companion website, available at This features multiple choice questions and rotatable 3D molecular structures.
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