21.5 Color and Paramagnetism of Complex Ions and Coordination Compounds | General Chemistry
Vložit
- čas přidán 14. 07. 2024
- Chad provides a succinct lesson explaining why many coordination compounds are vividly colored and explains how to determine if a complex will be paramagnetic or diamagnetic. The crystal field splitting energy corresponds to the energy of the light absorbed by many transition metal complexes as an electron is promoted from lower energy d orbital to a higher energy d orbital. It also commonly corresponds to the energy of visible light. And if a complex absorbs visible light, it will typically appear to have the complementary color in appearance. Finally, a steadfast rule is provided allowing one to determine which transition metal complexes should be expected to be colored and which to be colorless.
A paramagnetic complex experiences a weak attractive force when moving through a magnetic field resulting from a net spin due to the presence of unpaired electrons. So if a transition metal in a complex has unpaired electrons it will be paramagnetic. But if all the electrons are paired up there is no net spin and the species will experience a very, very slight repulsion in a magnetic field and is said to be diamagnetic. Chad reviews how to fill in the d electrons based upon the type of coordination complex (octahedral/low spin, octahedral/high spin, tetrahedral, or square planar) to determine if and how many unpaired electrons may be present.
I've embedded this playlist as a course on my website with all the lessons organized by chapter in a collapsible menu and much of the content from the study guide included on the page. Check this lesson out at www.chadsprep.com/chads-gener...
If you want all my study guides, quizzes, final exam reviews, and practice exams, check out my General Chemistry Master Course (free trial available) at www.chadsprep.com/genchem-you...
00:00 Lesson Introduction
00:26 Color of Transition Metal Complexes
06:53 Paramagnetic vs Diamagnetic
09:17 Sc^3+: Colorless and Diamagnetic
10:32 Cu^+: Colorless and Diamagnetic
12:06 Fe^2+ (low spin): : Colored and Diamagnetic
14:30 Fe^2+ (high spin): Colored and Paramagnetic
15:53 Cr^3+: Colored and Paramagnetic
17:21 FeF6^3- (weak field): Colored and Paramagnetic
19:19 Ni^2+ (square planar): Colored and Diamagnetic
20:12 Spectrochemical Series
www.chadsprep.com/
courses.chadsprep.com/pages/p...
I would not have been able to finish Gen. Chemistry without your videos!
Glad the channel has helped you!
I decided to comment on this video as it's your recent one for Gen Chem. I just wanted to say that your videos are the straight to the point and the most helpful that I have ever seen. I struggled so much in Chem 1 and Im glad to have discovered you for Chem 2. Thank you so much for making these videos and helping people like me understand chemistry. Thanks to you I made my first A+ on my cham exam :)) I hope to learn more from you in the future
Glad to hear it, hza a - Congrats on your recent grade!
@@ChadsPrep you should change your name to gigachad
That's so true! Him and Old School Chemistry channel help me the most and surprisingly they're both Christian :) I believe God gave them a gift of explaining complex subjects in a simpler way!
Hi, Chad. Just wanted to say thank you for all your help. Your organic chem videos were my life raft all throughout the semester and I would not have been able to finish Org Chem 1 without them. I hope you know that you’ve helped so many of us and I wish you all life’s blessings for it! ♥️
That's great to hear, Carla - glad the channel helped you!
Great video, Chad! Would love to see an update to either your Biochemistry or Physics videos.
Your videos are great! They really helped me with learning chemistry. Would love to see a playlist on a College Biology series! Thank you!
Chad, you're a huge blessing and a joy to watch. Been watching for many years since Organic my sophomore year, and I'm rewatching for the MCAT. Please--never stop. Thank you for everything
Thanks for your kind words - Appreciate it!
You have nailed it, Chad. A nice job Thank you Chad!
You're welcome and Thank You!
Just finished this playlist today! My AP Chemistry course didn't nearly cover all of the information I learned! Great job explaining all of these complex topics -- I'll see you in a few weeks for organic chemistry! :):)
Kudos, Alex Kirby - Happy ongoing Studying!
you have done more in 40 minutes than what my lecturer could do in 5 hours. thank you man
You're welcome and glad you found us!
Hello there Chad! Wow how lucky am I to have stumbled across your videos. I have been watching loads of your teaching videos from the general chemistry! Very useful and excellent way of teaching. Keep up the great work!
Glad you found us, SW - Happy Studying!
@@ChadsPrep Are you able to make videos on Quantum Mechanics (Chemistry) and Molecular spectroscopy. I found those topics challenging.
You're the best, Chad!
Thanks so much!
I love how I watched a 23 minute video and understood more than my Tuesday Thursday hour and a half lectures the entire semester. Definitely gonna do better on my exam at this point.
Great to hear it Elizabeth! And good luck on your exam :)
I had read a lot about Crystal field theory before I watched your video. I would say your video is even better than my professor's explanation. You are really explaining everything clearly! Thanks for your great video!
You're welcome - Glad you found the channel!
Hi Chad, you've been so helpful sir.
Excellent!
CHADS PREP THANK YOU SO MUCH FOR THIS I JUST GOT THE 5 THANK YOU THANK YOU THANK YOU I LOVE YOU
You're WELCOME!
Hey Chad, I was just wondering if you had any updates on when you will be making new videos on any subject. Just wanted to know, as a big fan of you!
your videos are so helpful and really help me review for my exams!
Glad to hear it, Michelle!
CHAD I LOVE YOU!!!
Excellent!
please keep going! thank you so much
You're welcome and Thank You!
Semesters over in a week and I just want to say thank you SO much, I was failing chem 1 and now I have an 85% which is so shocking and all thanks to you, I really can't thank you enough, and I will definitely be watching you for the next 3 years
Kudos on the grade improvement. Glad the channel is helping you out so much!
Would love to see some videos on chapter 24: Organic and Biological Chemistry. In my gen chem 2 class we’re covering this final chapter. It’s from Brown’s “Chemistry: the Central Science” 15th edition.
Thanks for all the content so far. My last test the whole class bombed…I got a 54%. On the retake I watched your videos and got a 96 🎉🎉🎉🎉
Hey Chad, starting Biochem and Physics next semester. Was just wondering if you are making an updated version of either lecture series any time soon?
Helps a lot! You are better than my lecturer graduated from Cambridge!
Glad to hear - Happy Studying!
thx a lot for this video
You're welcome!
Thank you!
You're welcome, A.F.
Hi chad, just wanted to thankyou and also ask if you have lessons done on the practical areas in A level chemistry, such as Unit 3 and unit 6 in edexcel chemistry?
very informative
Glad to hear it!
i love you chad
Glad the channel is of use!
More chem content please!
on it! :)
what a chad!
Happy Studying!
Professor: We’ll be learning Physics and Chemistry
Students: Easy, Chad has us covered
Professor: Afterwards, we’ll be doing Biology
Students: (*_*) …
I know you have many options, but Biology would be a great addition!
What course are you doing?! 😋
I'll be taking organic chemistry and biology. This channel has great videos covering all the sciences except biology.
When are you going to do BIOCHEMISTRY?
nice
Thx.
You ve' just saved my life😂😢
Glad you found us!
Thank you man inorganic chemistry iii is difficult
You're welcome!
We miss you; I hope you are doing alright, pls, don't disappear on us like that.
Doing fine - very busy with new projects. Happy Studying!
GOAT
Thank you!
@@ChadsPrep Hope you will start your new videos soon now that the school year has started!
How are you Chad sir? I can't see see your face and teaching style past 6 months. I think you are making videos for physics. Now am also making more videos. If you have feel free please share my channel on your community post. All the best let's see soon.
Great to hear it! Good luck with your channel :)
@@ChadsPrep Thanks for your support sir.
You're welcome!
I recently finally got a chance to watch the biochemistry videos on your website. They're really good. How come you don't put them here on CZcams? For some reason with the website I often can't get full screen to work when I'm watching with my phone. When you redo the biochem videos, do you think you'll add some topics such as the pentose phosphate pathway? In any case, thanks so much, your videos are great.
Question: if you have, let's say, 6 paired electrons in 3 low energy orbitals then you have a diamagnetic compound but if one of the electrons is moved to a higher energy orbitals by the absorption of light, will you then generate paramagnetism with light?
Hello David! You are correct in principle. In promoting an electron to a higher energy orbital you create an excited state which should technically be paramagnetic. But excited states typically have lifetimes on the order of femto- or picoseconds before they relax back to the ground state. So I don't know if they are around long enough to have a measurable effect, and also the promoted electron should be equally likely to have either spin. So half the time the excited state would have one spin and half the time the other. Averaged over time, we might suspect that these effects should cancel as well. But we're devolving into the theoretical here and I'm just shooting from the hip, so take what I say with a grain of salt!😊
hero
thx!
How can I know if the coordination compound is paramagnetic or diamagnetic if only its formula is given? e.g. [Ni(CN)4]2- , [Ni(NH3)4]2+ . Anyone??
You could write out the electron configuration and as a general rule if there are odd numbers of electrons there are unpaired = paramagnetic, an even numbers of electrons all electrons are paired = diamagnetic but there are exceptions
what happend to you ? sir.....where are you sir....?
Still here - busy, busy. Thanks for asking!
@@ChadsPrep Have you decided yet if your next playlist will be biochem, bio, or physics?
Where is the organic chemistry?
Hey Samrah, check out the organic playlist here czcams.com/play/PLMlqayk59IvrDL0v151TesyTA9-OjVjnQ.html
i never said thank you....
Chad: and you never will...
@@FahadProEditor LOL!