Dab tsi yog daim ntawv cog lus kaum rau saws?
Dab tsi yog daim ntawv cog lus kaum rau saws?

Video: Dab tsi yog daim ntawv cog lus kaum rau saws?

Video: Dab tsi yog daim ntawv cog lus kaum rau saws?
Video: Lwm Yaj - Thath Louang Wb Chaw Cog Lus 2024, Kaum ib hlis
Anonim

Cov saws puab maximizes lub daim ntawv cog lus cov ces kaum ntawm ib leeg ib khub thiab lwm yam atoms nyob rau hauv lub molecule. Cov khub ib leeg yog nyob rau hauv ib txoj hauj lwm equatorial muab 120 thiab 90 degree daim ntawv cog lus cov ces kaum , piv rau 90 degree xwb daim ntawv cog lus cov ces kaum yog muab tso rau ntawm txoj hauj lwm axial.

Raws li, qhov twg molecule muaj ib tug seesaw zoo li?

Feem ntau, plaub daim ntawv cog lus rau lub hauv paus atom ua rau tetrahedral lossis, tsawg dua, square planar geometry. Lub seesaw geometry, ib yam li nws lub npe, yog txawv. Nws tshwm sim thaum lub molecule muaj tus lej steric ntawm 5, nrog rau hauv nruab nrab atom raug khi rau 4 lwm atoms thiab 1 leeg ib khub (AX4E hauv AX notation).

Ib sab saum toj no, dab tsi yog daim ntawv cog lus ntawm cov square planar? Teb: Cov daim ntawv cog lus cov ces kaum hauv cov cov duab yuav yog kwv yees li qhov lawv nyob hauv geometrical configuration lawv los ntawm. Square planar daim ntawv cog lus kaum yuav yog 90 degrees.

Ib yam li ntawd, lub kaum sab xis ntawm lub trigonal bipyramidal yog dab tsi?

Trigonal bipyramidal cov tsos mob : tsib atoms nyob ib ncig ntawm lub hauv paus atom; peb hauv ib lub dav hlau nrog daim ntawv cog lus cov ces kaum ntawm 120 ° thiab ob qho tib si ntawm qhov kawg ntawm cov molecule. Octahedral: rau lub atom nyob ib ncig ntawm lub hauv paus atom, tag nrho nrog daim ntawv cog lus cov ces kaum ntawm 90 °.

Puas yog seesaw polar lossis nonpolar?

Nyob rau hauv VSEPR txoj kev xav, tus khub ib leeg yuam cov molecular geometry ntawm SF4 rau hauv cov duab pom. Ob ntawm S-F daim ntawv cog lus tau taw qhia deb ntawm ib leeg, thiab lawv daim ntawv cog lus dipoles tshem tawm. Tab sis lwm ob S-F dipoles yog taw tes "down". Lawv daim ntawv cog lus dipoles tsis tso tseg, yog li cov molecule yog polar.

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