Zinthu Zachilengedwe Zomwe Zili Zitsulo Zosintha
Zitsulo zosinthira ndi gulu la zinthu za mankhwala zomwe zili ndi makhalidwe apadera omwe ndi ofunikira pa ntchito zosiyanasiyana zamafakitale, ukadaulo, komanso zamoyo. Mu tebulo la periodic, zitsulo zosinthira zimayikidwa mu d-block, yomwe imaphatikizapo magulu 3 mpaka 12. Dzina lakuti "transition metal" limachokera ku kuthekera kwa zinthu izi kupanga ma ayoni okhala ndi ma oxidation states osiyanasiyana, yomwe ndi imodzi mwa makhalidwe awo ofunikira. Nkhaniyi ikambirana za zinthu za mankhwala zomwe zili mu transition metals mozama, makhalidwe awo, ndi zina mwa ntchito zawo zofunika.
Makhalidwe a Zitsulo Zosinthira
Kapangidwe ka Electron
Chimodzi mwa makhalidwe akuluakulu a zitsulo zosinthira ndi kapangidwe ka ma elekitironi awo. Ma elekitironi odzaza ma d orbitals ndi chizindikiro cha zinthu izi, ndipo kapangidwe ka ma elekitironi mu ma d orbitals awa ndi omwe amachititsa zinthu zambiri zapadera zakuthupi ndi zamakemikolo. Mwachitsanzo, chromium ili ndi kapangidwe ka ma elekitironi ka [Ar] 3d^5 4s^1, komwe kumasonyeza kudzazidwa pang'ono kwa ma d orbitals.
Kusinthasintha kwa Ma Oxidation Levels
Zitsulo zosinthira zimadziwika chifukwa cha kuthekera kwawo kuwonetsa mitundu yosiyanasiyana ya ma oxidation. Izi zikutanthauza kuti chinthu chimodzi chimatha kupanga ma ayoni okhala ndi ma charge osiyanasiyana, chinthu chomwe sichipezeka kawirikawiri pazinthu zomwe zili kunja kwa zitsulo zosinthira. Mwachitsanzo, manganese imatha kukhala ndi ma oxidation kuyambira +2 mpaka +7.
Kugwirizana kwa Mitundu Yovuta
Ma coordination complexes opangidwa ndi transition metals nthawi zambiri amakhala ndi mitundu yosangalatsa chifukwa cha kusintha kwa ma elekitironi awo a dd-d. Mitundu iyi imachitika chifukwa cha kuyamwa kwa kuwala pa ma wavelength enaake, zomwe zimapangitsa ma elekitironi omwe ali mu d-orbitals kukhala osangalala. Mwachitsanzo, copper(II) sulfate solution ndi yabuluu, pomwe nickel(II) chloride solution ndi yobiriwira.
Katundu wa Maginito
Zitsulo zosinthira zimasonyezanso mphamvu zapadera zamaginito, kaya ndi paramagnetic (yokhala ndi ma elekitironi osaphatikizidwa) kapena ferromagnetic (monga chitsulo, cobalt, ndi nickel, zomwe zimatha kusunga maginito). Zinthu zimenezi zimawapangitsa kukhala ofunikira pa ntchito monga kupanga maginito ndi zipangizo zosungira deta.
Zitsanzo ndi Ntchito za Zitsulo Zosinthira
Chitsulo (Fe)
Chitsulo ndi chitsulo chofala kwambiri chomwe chimagwiritsidwa ntchito tsiku ndi tsiku ndipo chimagwiritsidwa ntchito kwambiri tsiku ndi tsiku. Chitsulo chimakhala ndi mitundu yosiyanasiyana ya okosijeni, yofala kwambiri ndi +2 (ferrous) ndi +3 (ferric). Chimodzi mwa ntchito zazikulu za chitsulo ndi kupanga chitsulo, chomwe ndi chinthu chofunikira kwambiri pakupanga, kupanga magalimoto, ndi ukadaulo wina wambiri.
Mkuwa (Cu)
Mkuwa ndi chitsulo chosinthika chomwe chimadziwika ndi mphamvu zake zamagetsi komanso kutentha. Chimalimbananso ndi dzimbiri ndipo chimagwiritsidwa ntchito m'njira zosiyanasiyana, kuyambira mawaya amagetsi mpaka zida zamagetsi. Mkuwa umagwiritsidwanso ntchito popanga mapaipi amadzi chifukwa cha kukana kwake dzimbiri.
Nickel (Ni)
Nickel ndi chitsulo china chosinthika chomwe chimalimbana ndi dzimbiri ndipo nthawi zambiri chimagwiritsidwa ntchito mu alloys kuti chiwonjezere mphamvu ndi kukana okosijeni. Chimodzi mwa ntchito zazikulu za nickel ndikupanga chitsulo chosapanga dzimbiri, chomwe chimagwiritsidwa ntchito m'zida zapakhomo, zida zamafakitale, ndi zida zochitira opaleshoni.
Chromium (Cr)
Chromium imadziwika bwino chifukwa cha ntchito yake yoteteza dzimbiri komanso kunyezimira kwa zitsulo zina, monga chromium plating. Ma oxidation states +3 ndi +6 ndi omwe amapezeka kwambiri. Chromium ndi yofunika kwambiri popanga chitsulo chosapanga dzimbiri ndipo imagwiritsidwa ntchito mumakampani opanga utoto wa zikopa.
Platinum (Pt)
Platinum ndi chitsulo chosinthika chokhazikika chomwe sichimakhudzana ndi mankhwala ambiri. Izi zimapangitsa kuti chikhale chofunikira kwambiri pakugwiritsa ntchito komwe kumafunikira kukana dzimbiri ndi okosijeni, monga zosakaniza zamagalimoto, zodzikongoletsera, ndi zida zamankhwala monga pacemaker.
Titaniyamu (Ti)
Titaniyamu ndi chitsulo chodziwika bwino chifukwa cha mphamvu zake zambiri, kulemera kwake kochepa, komanso kukana dzimbiri. Chifukwa cha makhalidwe amenewa, titaniyamu imagwiritsidwa ntchito kwambiri mumakampani opanga ndege, mankhwala (monga mafupa opangidwa), komanso zinthu zapamwamba zamasewera.
Zirconium (Zr)
Zirconium ili ndi mphamvu yolimbana ndi dzimbiri mofanana ndi platinamu koma ndi yotsika mtengo, zomwe zimapangitsa kuti ikhale chisankho chabwino kwambiri chogwiritsidwa ntchito m'mafakitale monga ma reactor a nyukiliya ndi mankhwala amphamvu. Zirconium imagwiritsidwanso ntchito popanga mapaipi ndi zida zochitira opaleshoni chifukwa cha kugwirizana kwake bwino kwambiri.
Cobalt (Co) Zolemba
Cobalt imadziwika ndi mphamvu yake yoyendetsera maginito ndipo nthawi zambiri imagwiritsidwa ntchito popanga maginito, mabatire a lithiamu-ion, komanso ngati chothandizira mumakampani opanga mankhwala. Cobalt ndi yofunika kwambiri popanga ma alloys omwe amafunikira kukana kutentha ndi okosijeni.
Ruthenium (Ru)
Ruthenium ndi chitsulo chosinthira chomwe chimagwiritsidwa ntchito nthawi zambiri mumakampani amagetsi komanso ngati chothandizira. Mwachitsanzo, mu organic chemistry, ruthenium imagwiritsidwa ntchito m'njira zosiyanasiyana zochizira zomwe zimagwirizanitsidwa mofanana, monga popanga ammonia.
Udindo wa Zachilengedwe wa Zitsulo Zosinthira
Kuwonjezera pa ntchito zawo zamafakitale ndi ukadaulo, zitsulo zina zosinthira ndizofunikira kwambiri mu biology. Mwachitsanzo, chitsulo ndi chinthu chofunikira kwambiri mu hemoglobin, puloteni yomwe imanyamula mpweya m'magazi. Mkuwa umagwira ntchito mu ma enzyme ena omwe amagwira ntchito yopuma m'maselo. Zinc, ngakhale ili mu p-block, nthawi zambiri imaonedwa ngati membala wa zitsulo zosinthira chifukwa cha ntchito yake yofunika kwambiri mu ma enzyme ambiri ndi ntchito zina zamoyo.
Mapeto
Zitsulo zosinthira zimaphimba tebulo la periodic ndipo zili ndi zinthu zapadera zomwe zimazipangitsa kukhala zofunika kwambiri m'magawo osiyanasiyana. Kuyambira ntchito zamafakitale monga kupanga zitsulo ndi zamagetsi mpaka ntchito yawo yofunika kwambiri mu biology, zitsulo zosinthira ndi chimodzi mwa magulu a zinthu zosinthasintha komanso zodalirika. Kumvetsetsa zinthu ndi ntchito zake kumatithandiza kupitiliza kugwiritsa ntchito mphamvu zonse za zinthuzi pakukula kwaukadaulo ndi kupeza zinthu zatsopano zasayansi mtsogolo.
