تاریخ روایی(روایت تاریخ)
Earlier than intensive computer calculations had been possible, it was thought that bonding in phosphorus(V) compounds involved d orbitals. Laptop modeling of molecular orbital theory signifies that this bonding includes solely s- and p-orbitals. All 4 symmetrical trihalides are well known: gaseous PF3, the yellowish liquids PCl3 and PBr3, and …
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