The arrows are drawn facing away from Phosphorus because the Chlorine atoms are much more negative due to the amount of unshared electron pairs that the Chlorine atoms posses. Become a member and unlock all Study Answers. = number of sigma bonds + number of lone pairs on P Elements in the first 2 periods of the Periodic Table do not have access to the d sublevel and must adhere to the octet (or duet H and He) rule. P does not follow the octet rule. In this molecule of Phosphorus Pentachloride the five valance electrons surrounding phosphorus are being bonded with 5 atoms of Chloride which all have 7 valance electrons. It will hybridize to form 5 equal  dsp3 orbitals and will have a trigonal bipyramidal shape. Phosphorous having valence electrons in the 3rd energy level, will also have access to the 3d sublevel, thus allowing for more than 8 electrons. google_ad_height = 60; By reading through the molecules description I am now much more aware of its properties. //-->. Intermolecular forces are also covered which means by reading this I have a full picture of the molecule. The actual geometry of the compound is determined by hybridization. The Chlorine atoms are spaced apart 120 degrees in the trigonal planar part of the molecule and 90 degrees for the others. Phosphorus pentachloride is manufactured by either batch or continuous processing. google_ad_width = 468; This consists of Phosphorus as the central atom. The bonds in the molecule PCl5 are moderately covalent because the electronegativity value of Phosphorus is 2.19 and the electronegativity value of Chlorine is 3.16. Phosphorous having valence electrons in the 3rd energy level, will also have access to the 3d sublevel, thus allowing for more than 8 electrons. It will hybridize to form 5 equal dsp3 orbitals and will have a trigonal bipyramidal shape. Polarity is covered in this blog withgives me a much more complete understanding about it. It will hold more than 8 electrons. When subtracted, the absolute value of the difference is 0.97 which indicates that the bonds are moderately covalent. The resulting Lewis structure is: Phosphorus pentachloride. Lewis Dot of Phosphorous Pentachloride. PCl 5. from  http://treefrog.fullerton.edu/chem/LS/PCl5LS.html. Back. This knowledge is even more solidified when I read the practical use about the batteries. It will hold more than 8 electrons. google_ad_slot = "2147476616"; The Chlorine atoms are spaced apart 120 degrees in the trigonal planar part of the molecule and 90 degrees for the others This blog looks great, it has a great color set and has been layer out in an easy to follow way. Structure of Phosphorus Pentachloride Phosphorus Pentachloride is a type of molecule that has a trigonal bipyramidal shape. This consists of Phosphorus as the central atom. P does not follow the octet rule. Phosphorus pentachloride is considered an, Phosphorus Pentachloride is a type of molecule that has a trigonal bipyramidal shape.